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Results for "

polar

" in MedChemExpress (MCE) Product Catalog:

By Targets:	Adrenergic Receptor (2) Antibiotic (1) Apoptosis (1) Bacterial (4) Biochemical Assay Reagents (35) Cholinesterase (ChE) (2) Cytochrome P450 (3) Dihydrofolate reductase (DHFR) (1) DNA Alkylator/Crosslinker (2) DNA/RNA Synthesis (2) Drug Derivative (3) Drug Intermediate (1) Endogenous Metabolite (18) Enteropeptidase (1) Environmental Pollutants (7) Exosomes (1) Fluorescent Dye (16) Fungal (1) Glyoxalase (GLO) (1) Herbicide (2) Histone Acetyltransferase (1) Histone Demethylase (1) Interleukin Related (2) Isotope-Labeled Compounds (11) Keap1-Nrf2 (1) Liposome (16) mAChR (3) Monoamine Oxidase (3) Necroptosis (1) NF-κB (1) NO Synthase (1) Parasite (1) PKA (2) RAR/RXR (1) Reference Standards (9) Renin (1) RIP kinase (1) Thyroid Hormone Receptor (1) TNF Receptor (1)
By Research Areas:	Cancer (30) Cardiovascular Disease (3) Endocrinology (3) Infection (14) Inflammation/Immunology (11) Metabolic Disease (8) Neurological Disease (13)
Click Chemistry:	Azide (1)
Oligonucleotides:	Solvents (2) Pegylated Lipids (4) Cationic Lipids (6) Phospholipids (4) Cholesterol (1)

125

Inhibitors & Agonists

Screening Libraries

Fluorescent Dyes

Biochemical Assay Reagents

Peptides

Natural
Products

Isotope-Labeled Compounds

Click Chemistry

Oligonucleotides

GMP Molecules

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-Y0320

Dimethyl sulfoxide, meets analytical specification of Ch.P. 340+ Cited Publications DMSO, meets analytical specification of Ch.P.	Environmental Pollutants Bacterial Cholinesterase (ChE)	Infection Inflammation/Immunology Cancer
Dimethyl sulfoxide (DMSO), meets analytical specification of Ch.P. is an aprotic solvent that dissolves polar and non-polar compounds, including water-insoluble therapeutic and toxic agents. Dimethyl sulfoxide (DMSO) has a strong affinity for water and can rapidly penetrate or enhance the penetration of other substances into biological membranes. Dimethyl sulfoxide also has potential free radical scavenging and anticholinesterase effects and may affect coagulation activity. Dimethyl sulfoxide also induces histamine release from mast cells but is thought to have low systemic toxicity. Dimethyl sulfoxide also exhibits antifreeze and antibacterial properties . MCE provides Dimethyl sulfoxide that complies with the inspection standards (Ch.P) of Part 4 of the Chinese Pharmacopoeia (2020 Edition). Amicrobic, low endotoxin, can be used in various biochemical experiments such as drug dissolution.

HY-101461

Methyl-β-cyclodextrin 105+ Cited Publications Methyl-beta-cyclodextrin	Environmental Pollutants Biochemical Assay Reagents	Cancer
Methyl-β-cyclodextrin (Methyl-beta-cyclodextrin) is a cyclic heptasaccharide used to deliver hydrophobic agents based on its property of solubilizing non-polar substances. Methyl-β-cyclodextrin is also extensively used as a cholesterol-depleting reagent . Methyl-β-cyclodextrin strongly reduces clathrin-dependent endocytosis . Methyl-β-cyclodextrin blocks cell migrasome formation .

HY-B0399

L-Carnitine Maximum Cited Publications 20 Publications Verification (R)-Carnitine; Levocarnitine	Endogenous Metabolite	Neurological Disease Cancer
L-Carnitine ((R)-Carnitine), a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine is an antioxidant. L-Carnitine can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-D0041

Calcein-AM 80+ Cited Publications Calcein acetoxymethyl ester	Fluorescent Dye	Cancer
Calcein AM, has cell membrane permeability and can easily enter the cell. Calcein AM has no fluorescence and is hydrolyzed by endogenous esterase in the cell to produce polar molecule Calcein (Calcein), which has strong negative charge and cannot permeate the cell membrane. Calcein can emit strong green fluorescence, so it is often used with Propidium Iodide for cell viability/virulence detection, excitation/emission wavelength: 494/515 nm .

HY-Y1275

N-Methylpyrrolidone NMP; 1-Methyl-2-pyrrolidinone	Environmental Pollutants Biochemical Assay Reagents	Cancer
N-Methylpyrrolidone (1-Methyl-2-pyrrolidinone), a five-membered cyclic amide, is an orally active organic polar solvent with teratogenicity and toxicity. N-Methylpyrrolidone is low in acute toxicity with a LD₅₀ value of 3914 mg/kg in rats and of 4050 mg/kg in mice. N-Methylpyrrolidone is extensively used in the manufacture of adhesives, paints, fuels, and pharmaceuticals .

HY-W110551

2-Methacryloyloxyethyl phosphorylcholine	Biochemical Assay Reagents Interleukin Related	Infection Inflammation/Immunology
2-Methacryloyloxyethyl phosphorylcholine is a polymer monomer containing a phospholipid polar group. 2-Methacryloyloxyethyl phosphorylcholine polymers modify the surface properties of materials and reduce protein-surface interactions, reduce IL-8 production, inhibit cell, Staphylococcus aureus, and Porphyromonas gingivalis adhesion. 2-Methacryloyloxyethyl phosphorylcholine is used in the study of medical device-associated infections, periodontitis, and dental caries .

HY-Y0873L

PEG800 Polyethylene glycol 800	Environmental Pollutants Biochemical Assay Reagents	Others
PEG800 (Polyethylene glycol 800) is a nonionic surfactant that is soluble in water and many polar solvents .

HY-W008566

Norharmane Norharman; β-Carboline	Monoamine Oxidase Endogenous Metabolite	Infection Neurological Disease Cancer
Norharmane (Norharman), a β-carboline alkaloid, is a potent and reversible monoamine oxidase inhibitor, with IC₅₀ values of 6.5 and 4.7 μM for MAO-A and MAO-B, respectively. Norharmane causes antidepressant responses. Norharmane is also a prospective anti-cancer photosensitizer. Norharmane alters polar auxin transport (PAT) by inhibiting PIN2, PIN3 and PIN7 transport proteins, thus causing a significant inhibitory effect on the growth of Arabidopsis thaliana seedlings .

HY-116425

N-1-Naphthylphthalamic acid 2 Publications Verification Alanap 1	Environmental Pollutants Herbicide	Others
N-1-Naphthylphthalamic acid (Alanap 1) is a modulator of polar auxin transport that competes with auxin (indole-3-acetic acid, IAA) for membrane binding sites. N-1-Naphthylphthalamic acid also disrupts maize leaf initiation, KNOX protein regulation, and leaf margin formation .

HY-B2246

L-Carnitine hydrochloride Maximum Cited Publications 20 Publications Verification (R)-Carnitine hydrochloride; Levocarnitine hydrochloride	Endogenous Metabolite	Metabolic Disease Cancer
L-Carnitine hydrochloride ((R)-Carnitine hydrochloride), a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine hydrochloride functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine hydrochloride is an antioxidant. L-Carnitine hydrochloride can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-Y0971

Tetrabutylammonium fluoride (solution),1M in THF TBAF	Biochemical Assay Reagents	Others
Tetrabutylammonium fluoride is an organic compound containing both ammonium and fluorine functional groups. It is commonly used as a reagent in various chemical synthesis applications, especially as a source of fluoride ions for nucleophilic reactions. Tetrabutylammonium fluoride has several properties that make it suitable for these applications, including its high solubility in polar solvents and its ability to selectively activate certain chemical bonds. In addition, it can be used as a catalyst for organic reactions and as an electrolyte for batteries.

HY-DY1036

Calcein-AM (solution)	Fluorescent Dye	Cancer
Calcein AM (solution) , has cell membrane permeability and can easily enter the cell. Calcein AM has no fluorescence and is hydrolyzed by endogenous esterase in the cell to produce polar molecule Calcein (Calcein) , which has strong negative charge and cannot permeate the cell membrane. Calcein can emit strong green fluorescence, so it is often used with Propidium Iodide for cell viability/virulence detection, excitation/emission wavelength: 494/515 nm . Solvent and concentration: DMSO: 2 mM

HY-W105518

L-Carnitine tartrate 15+ Cited Publications	Endogenous Metabolite	Neurological Disease
L-Carnitine tartrate is a highly polar, small zwitterion. L-Carnitine tartrate is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine tartrate functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine tartrate is an antioxidant. L-Carnitine tartrate can ameliorate metabolic imbalances in many inborn errors of metabolism ^{[3] ^.}

HY-157950

DSPE-PEG2000-triGalNAc ammonium	Liposome	Cancer
DSPE-PEG2K-triGalNAc ammonium is a polar lipid composed of DSPE and tri-N-acetylgalactosamine that can be used to construct liposomes target to asialoglycoprotein receptor (ASGPR).

HY-21226

Levoglucosenone	Biochemical Assay Reagents	Others
Levoglucosenone Levoglucosenone has unique chemical properties that make it an important intermediate in the production of a wide variety of chemicals, including pharmaceuticals, fragrances and flavorings. Due to its ability to dissolve polar and non-polar compounds, it can also be used as a solvent or fuel additive.

HY-113116

Sphinganine 1-phosphate 1 Publications Verification D-erythro-Dihydrosphingosine 1-phosphate	Endogenous Metabolite	Inflammation/Immunology Cancer
Sphinganine 1-phosphate (D-erythro-Dihydrosphingosine 1-phosphate) is a polar sphingolipid metabolite that regulates cell migration, differentiation, survival and complex physiological processes .

HY-124190

Isopropyl myristate	Environmental Pollutants Biochemical Assay Reagents	Others
Isopropyl myristate (IPM) is the ester of isopropyl alcohol and myristic acid. Isopropyl myristate is used for transdermal delivery of some compounds. Isopropyl myristate is a polar emollient and is used in cosmetic and topical medicinal preparations where good absorption into the skin is desired .

HY-W115738

PAR	Biochemical Assay Reagents	Others
PAR is an azo dye widely used as a colorimetric reagent for metal ions. PAR forms stable chelates with different metal ions. PAR can also complex with heavy metal ions in polar organic solvents, such as ethanol .

HY-Y0320R

Dimethyl sulfoxide (Standard) 1 Publications Verification DMSO, meets analytical specification of Ch.P. (Standard)	Reference Standards Cholinesterase (ChE) Bacterial	Infection Inflammation/Immunology Cancer
Dimethyl sulfoxide (Standard) is the analytical standard of Dimethyl sulfoxide. This product is intended for research and analytical applications. Dimethyl sulfoxide (DMSO) is an aprotic solvent that dissolves both polar and nonpolar compounds. Dimethyl sulfoxide has anti-freezing and bacteriostatic properties .

HY-112076

Atropine methyl bromide Methylatropine bromide	mAChR	Neurological Disease
Atropine methyl bromide, a muscarinic receptor (mAChR) antagonist, is a quaternary ammonium salt of atropine and a mydriatic for dilation of the pupil during ophthalmic examination. It is introduced for relieving pyloric spasm in infants for its highly polar nature. It penetrates less readily into the central nervous system than atropine .

HY-174940

E. coli Extract Polar	Biochemical Assay Reagents	Others
E. coli Extract Polar is a polar lipid extract of Escherichia coli containing phosphatidylethanolamine, phosphatidylglycerol, and cardiolipin for reconstitution of membrane proteins.

HY-W013967

1,6-Diphenylhexa-1,3,5-triene	Fluorescent Dye	Infection
1,6-Diphenylhexa-1,3,5-triene is a membrane intercalator and hydrophobic fluorescent probe. 1,6-Diphenylhexa-1,3,5-triene intercalates into the non-polar region of lipid bilayers of adipocyte membranes with probe/membrane equilibrium affected by temperature, probe concentration, and membrane concentration. 1,6-Diphenylhexa-1,3,5-triene’s fluorescence intensity correlating with adipocyte membrane probe incorporation (Ex/Em = 350/452 nm) .

HY-B2246S

L-Carnitine-d9 chloride 1 Publications Verification (R)-Carnitine-d9 chloride; Levocarnitine-d9 chloride	Isotope-Labeled Compounds Endogenous Metabolite	Metabolic Disease
L-Carnitine-d₉ (chloride)e is the deuterium labeled L-Carnitine chloride. L-Carnitine chloride, a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine chloride functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine chloride is an antioxidant. L-Carnitine chloride can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-W010795

Tetraheptylammonium bromide (>98%,BC)	Biochemical Assay Reagents	Others
Tetraheptylammonium bromide (>98%,BC) (THAB) is a quaternary ammonium compound commonly used as a phase transfer catalyst in organic synthesis reactions, especially those involving charged species or polar reagents. It can facilitate the transfer of reactants between two immiscible phases, such as water and organic solvents, by forming stable ion pairs. In addition, THAB is used as a surfactant, and as an additive in various products such as cosmetics, pharmaceuticals, and detergents. Due to THAB's ability to form complexes with these ions, its potential use in the removal of heavy metal ions from wastewater was also investigated.

HY-W099630

Heptadecan-9-ol 9-Heptadecanol	Biochemical Assay Reagents	Others
Heptadecan-9-ol (9-Heptadecanol) is a lipid with a secondary hydroxyl group and two non-polar tails.

HY-112076A

Atropine methyl nitrate Methylatropine nitrate; Atropine methyl nitrate	mAChR	Neurological Disease
Atropine methyl bromide, a muscarinic receptor (mAChR) antagonist, is a quaternary ammonium salt of atropine and a mydriatic for dilation of the pupil during ophthalmic examination. It is introduced for relieving pyloric spasm in infants for its highly polar nature. It penetrates less readily into the central nervous system than atropine .

HY-Y1155

Hexamethylphosphoramide HMPA	Environmental Pollutants DNA Alkylator/Crosslinker Biochemical Assay Reagents Cytochrome P450	Inflammation/Immunology Endocrinology Cancer
Hexamethylphosphoramide is an orally active polar aprotic solvent, flame retardant additive, and carcinogen. Hexamethylphosphoramide undergoes cytochrome P-450-mediated N-demethylation to Formaldehyde. Hexamethylphosphoramide induces DNA-protein crosslinks. Hexamethylphosphoramide has been linked to nasal tumors (squamous cell carcinoma, adenoid squamous cell carcinoma), squamous metaplasia, rhinitis, tracheitis, and reversible and irreversible infertility .

HY-B0399R

L-Carnitine (Standard) (R)-Carnitine (Standard); Levocarnitine (Standard)	Reference Standards Endogenous Metabolite	Neurological Disease Cancer
L-Carnitine (Standard) is the analytical standard of L-Carnitine. This product is intended for research and analytical applications. L-Carnitine ((R)-Carnitine), a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine is an antioxidant. L-Carnitine can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-123622

CYMAL-5, 98% (TLC)	Biochemical Assay Reagents	Others
CYMAL-5, 98% (TLC) is a cycloalkyl aliphatic saccharide. CYMAL-5, 98% (TLC) is a glycosidic surfactant (GS) with a chiral maltose polar head group and a cyclohexyl-pentyl hydrophobic tail. CYMAL-5, 98% (TLC) is a non-ionic detergent that has a tenfold lower critical micelle concentration (CMC) in comparison with OG, and has previously been used for membrane protein extraction or crystallization of membrane proteins for X-ray crystallographic studies .

HY-W141932

N-Stearoylglycine Stearoylglycine; N-Octadecanoylglycine	Endogenous Metabolite	Others
N-stearoylglycine is a lipid and has a small ionizable polar headgroup whose charge is pH dependent and whose amide moiety can form H-bonded network between adjacent molecules in ordered films .

HY-157666

13:0 PC PC(13:0/13:0); DTPC	Endogenous Metabolite	Others
13:0 PC (PC(13:0/13:0)), also known as ditridecanoyl phosphatidyl choline (DTPC), is a phospholipid characterized by its unique structure that includes a polar head with a positively charged quaternary amine and a negatively charged phosphate, along with two non-polar fatty acid tails.

HY-W248583

Pyrromethene 650 PM650	Fluorescent Dye	Others
Pyrromethene 650 (PM650) is a green-fluorescent polar tracer dye. It is used for investigations of membrane fusion, lysis, and gap-junctional communication and to detect volume changes in cells or liposomes.

HY-W587663

4′-DTMP	Dihydrofolate reductase (DHFR)	Infection
4 '-DTMP is a DHFR inhibitor with Ki of 5.1 nM (DHFR ^WT) and 34.3 nM (DHFR ^L28R), respectively. 4 '-DTMP carries a polar modification that induces additional local interactions with the enzyme. In particular, the hairpin structure on the M20 ring is related to the internal communication of the DHFR. 4 '-DTMP has potential inhibition of E.coli .

HY-116425R

N-1-Naphthylphthalamic acid (Standard) Alanap 1 (Standard)	Herbicide Reference Standards	Others
N-1-Naphthylphthalamic acid (Standard) is the analytical standard of N-1-Naphthylphthalamic acid. This product is intended for research and analytical applications. N-1-Naphthylphthalamic acid (Alanap 1) is a modulator of polar auxin transport that competes with auxin (indole-3-acetic acid, IAA) for membrane binding sites. N-1-Naphthylphthalamic acid also disrupts maize leaf initiation, KNOX protein regulation, and leaf margin formation .

HY-D1777

Pyrromethene 605 PM605	Fluorescent Dye	Others
Pyrromethene 605 (PM605) is a green-fluorescent polar tracer dye. It is used for investigations of membrane fusion, lysis, and gap-junctional communication and to detect volume changes in cells or liposomes.

HY-124891

1-Phenylpyrrole N-Phenylpyrrole	Fluorescent Dye	Others
1-Phenylpyrrole (N-Phenylpyrrole) has dual fluorescent properties. 1-Phenylpyrrole displays a single band in nonpolar solvents and a second red-shifted fluorescent band in polar solvents .

HY-17521

Flumorph SYP-L190	Fungal	Infection
Flumorph (SYP-L190) is a carboxylic acid amide fungicide. Flumorph inhibits the polar growth of Phytophthora melonis by disrupting the arrangement of filamentous actin. Flumorph can be used to study Phytophthora melonis infection .

HY-N10510

Blood group A antigen tetraose type 5 A-Tetrasaccharide	Others	Others
Blood group A antigen tetraose type 5 (A-Tetrasaccharide) is a tetrasaccharide and a blood group specific oligosaccharide, inhibits the binding of anti-A antibody to blood group A substance. Blood group A antigen tetraose type 5 can be isolated from polar bear milk samples .

HY-D1672

TMR Biocytin	Fluorescent Dye	Neurological Disease
TMR Biocytin is a polar tracer used in the research of cell-cell and cell-liposome fusions, as well as membrane permeability and cellular uptake during pinocytosis. TMR Biocytin can be detected using streptavidin, and is an effective neuronal tracer in live tissue (Ex=544 nm, Em=571 nm) .

HY-Y1275S

N-Methylpyrrolidone-d9 NMP-d₉; 1-Methyl-2-pyrrolidinone-d₉	Isotope-Labeled Compounds Biochemical Assay Reagents	Cancer
N-Methylpyrrolidone-d₉ (NMP-d₉) is deuterium labeled N-Methylpyrrolidone. N-Methylpyrrolidone (1-Methyl-2-pyrrolidinone), a five-membered cyclic amide, is an orally active organic polar solvent with teratogenicity and toxicity. N-Methylpyrrolidone is low in acute toxicity with a LD₅₀ value of 3914 mg/kg in rats and of 4050 mg/kg in mice. N-Methylpyrrolidone is extensively used in the manufacture of adhesives, paints, fuels, and pharmaceuticals .

HY-W243002

Acetyl-L-homoserine lactone	Bacterial	Infection
Acetyl-L-homoserine lactone is a member of the family of N-acylated homoserine lactones (HSLs). Acetyl-L-homoserine lactone is a polar mediator of cell-cell interactions in bacterial biofilms .

HY-117289

AKOS B018304	Drug Intermediate	Others
AKOS B018304 is an arylalkylidene derivative, with polar substitution at para-position.

HY-W248118

Pyrromethene 556 PM556	Fluorescent Dye	Others
Pyrromethene 556 (PM556) is a green-fluorescent polar tracer dye. It is used for investigations of membrane fusion, lysis, and gap-junctional communication and to detect volume changes in cells or liposomes.

HY-W099632

2-Hexyldecanoic acid	Biochemical Assay Reagents	Infection Inflammation/Immunology
2-Hexyldecanoic acid is a lipid containing one carboxylic acid group and two non-polar tails. In the presence of EDC, HATU and DCC, carboxylic acid groups can undergo continuous amide coupling reactions with amine-containing biomolecules to form stable amide bonds. 2-Hexyldecanoic acid can be used as an aerolysin inhibitor to prevent bacterial pathogens. 2-Hexyldecanoic acid can cause contact dermatitis .

HY-115756

4-Maleimidosalicylic acid	Others	Others
4-Maleimidosalicylic acid is a polar maleimide, and does not suppress IL-2 production in JURKAT T cells .

HY-165104

β-L-Gulopyranosyl-caldarchaetidyl-glycerol GuCGp; Gulopyranosyl-(β1-1)-caldarchaetidylglycerol	Bacterial	Others
β-L-Gulopyranosyl-caldarchaetidyl-glycerol (GuCGp) is a compound that is studied in the polar lipid composition of thermoacidophilic bacteria. Its content varies under different culture conditions, which may be related to the adaptation of bacteria to the environment.

HY-175412

DDTAC Dodecylmercapto-S-(poly(tris(hydroxymethyl)acrylamidomethane); H12-TAC	Biochemical Assay Reagents	Others
DDTAC (H12-TAC) is a detergent that can extract and solubilize membrane proteins. DDTAC has a thio dodecanoyl chain linked to a polar group made of Tris polyalcoholic moieties and can be utilized in extracting yeast ATP synthase from mitochondrial membranes .

HY-17650

DMDHP (±)-Dimyristoyl-2,3-dimethylhydroxypropylamine	Liposome	Others
DMDHP ((±)-Dimyristoyl-2,3-dimethylhydroxypropylamine) is a cationic lipid with a polar head group containing a dihydroxy group. DMDHP exhibits superior transfection efficiency and lower toxicity at high DNA doses in mouse intrapulmonary transfection model. DMDHP is commonly used for gene delivery .

HY-Y1275S1

N-Methylpyrrolidone-d3 NMP-d₃; N-Methyl-2-pyrrolidone-d₃	Isotope-Labeled Compounds	Others
N-Methylpyrrolidone-d₃ is the deuterium labeled N-Methylpyrrolidone . N-Methylpyrrolidone (1-Methyl-2-pyrrolidinone), a five-membered cyclic amide, is an organic polar solvent. N-Methylpyrrolidone is extensively used in the manufacture of adhesives, paints, fuels, and pharmaceuticals .

HY-W591449

DOPE-PEG2000-Azide	Liposome	Cancer
DOPE-PEG2000-Azide is a liposome to simulate biological phospholipid membrane. Liposomes are the main component of vesicles with concentric phospholipid bilayer membranes, which can be used to construct drug delivery systems for anti-cancer and anti-infection fields. Highly polar water-soluble payloads can be trapped in the internal aqueous space of liposomes, while lipophilic payloads can partition into and become part of the lipid bilayer. Especially for delivering antisense oligonucleotides, it can overcome problems such as inefficient cellular uptake and rapid loss in the body .

Cat. No.	Product Name

HY-L0101V

FCH Group Screening Library	2,244,487 compounds
FCH Group Screening Library Collection contains about 2,244,487 lead-like compounds for biological screening. This brand new collection comprises polar molecules with pharmacologically important groups such as free carboxylic and amino groups.

HY-L0124V

Chemspace CNS-Focused Library

13,082 compounds

The basic requirements for the compounds that are supposed to penetrate the blood-brain barrier are somewhat different from those for the majority of drug discovery projects. Alongside the known problem with delivery of the large and non-polar compounds and their penetrability through the cell membrane, the other issue arises as well: small and polar compounds are not able to pass the Blood-Brain Barrier. Chemspace CNS-focused library comprises quite small, non-polar compounds that are also free from PAINS/toxic fragments and aggregators.

HY-L917

RNA Binding Library

5,619 compounds

RNA is crucial for the regulation of numerous cellular processes and functions. With the in-depth study of disease mechanisms, processes such as RNA expression, splicing, translation, and stability regulation have become new targets for disease intervention. RNA has provided new therapeutic modalities for metabolic diseases, genetic disorders, and cancer patients, resulting in several innovative drugs.

MCE R&D team collected small molecules targeting RNA from the PDB, R-BIND, ROBIN, and internal database as the positive dataset, and non-targeting RNA small molecules from ROBIN as the negative dataset. Based on the GeminiMol pre-trained model, we encoded the molecules and calculated over 1700 molecular descriptors using Mordred as inputs for the model. Subsequently, we employed 13 deep learning models to learn from the data. All of which yielded good training results, with AUROCs greater than 0.75. Ultimately, we selected the Finetune model to screen HY-L901P, which exhibited the best classification performance, achieving an AUROC of 0.82 and a prediction accuracy of 0.76. We then applied filtering based on StaR rules (with at least two of the following properties: cLogP ≥ 1.5, Molar Refractivity ≥ 4, Relative Polar Surface Area ≤ 0.3) to obtain a library containing approximately 5,000 small molecule compounds targeting RNA. This library serves as a valuable tool for screening small molecules that interact with RNA.

HY-L936V0

Molecular Glue Virtual Library

11412 compounds

Molecular Glue Virtual Library is constructed using generative AI technology, integrating the structural features, activity data of known molecular glues, and interaction information of ternary complexes (target protein-E3-molecular glue). Endowed with structural novelty, drug-likeness, diversity and synthesizability, it is applicable to molecular glue-based AI drug screening and large-scale virtual screening.

MCE builds this library based on high-quality molecular building blocks by virtue of robust computing power, coupled with rigorous reaction rules and optimized compound generation strategies. To ensure library quality, molecules with high synthetic difficulty, poor drug-likeness, PAINS and other undesirable molecules are excluded first. Subsequently, scaffold-based compound analysis is performed to screen drug-like diverse molecules for synthesizability evaluation; those with excessively high synthetic difficulty are removed, ultimately forming a large-scale molecular glue virtual library with structural diversity, synthesizability and drug-likeness.

Compounds in the library can be synthesized in only 1-2 chemical reaction steps. With MCE’s experienced chemical synthesis team, custom synthesis of different scales from milligram to kilogram can be easily achieved to meet diverse customer needs.

HY-L912V0

MegaUni 10M Virtual Diversity Library

10,000,000 compounds

With MCE's 40,662 BBs, covering around 273 reaction types, more than 40 million molecules were generated. Compounds which comply with Ro5 criteria were selected. Inappropriate chemical structures, such as PAINS motifs and synthetically difficult accessible, were removed. Based on Morgan Fingerprint, molecular clustering analysis was carried out, and molecules close to each clustering center were extracted to form this drug-like and synthesizable diversity library. These selected molecules have 805,822 unique Bemis-Murcko Scaffolds (BMS) with diversified chemical space. This library is highly recommended for AI-based lead discovery, ultra-large virtual screening and novel lead discovery.

HY-L912V

MegaUni 10M Virtual Diversity Library

10,000,000 compounds

HY-L910V

MegaUni 50K Virtual Diversity Library

50,000 compounds

MegaUni 50K Virtual Diversity Library consists of 50,000 novel, synthetically accessible, lead-like compounds. With MCE's 40,662 Building Blocks, covering around 273 reaction types, more than 40 million molecules were generated. Based on Morgan Fingerprint and Tanimoto Coefficient, molecular clustering analysis was carried out, and molecules closest to each clustering center were extracted to form a drug-like and synthesizable diversity library. The selected 50,000 drug-like molecules have 46,744 unique Bemis-Murcko Scaffolds (BMS), each containing only 1-3 compounds. This diverse library is highly recommended for virtual screening and novel lead discovery.

HY-L942

Allosteric Modulator Fragment Library

1802 compounds

In contrast to the high conservation of conventional orthosteric sites, allosteric sites possess structural characteristics of low conservation, high hydrophobicity, weak polarity, confined spatial geometry, and dynamic cryptic properties. There is a significant difference between their core structures and orthosteric pockets — allosteric pockets are mostly dynamic grooves formed by protein conformational changes, subunit interface clefts, or shallow depressions, rather than the rigid "keyhole" structure of orthosteric sites. With looser spatial constraints, allosteric sites have the advantages of high selectivity and low off-target risk, and have become an important direction in new drug discovery.

Based on the dynamic, hydrophobic, and narrow-long spatial characteristics of allosteric pockets, MCE has performed targeted modification and screening of fragments. The screening criteria strictly conform to the requirements of allosteric binding: molecular weight is controlled at 120–280 Da (to meet the core needs of small molecules in fragment libraries and high derivatization), hydrogen bond donors (HBD ≤ 2), hydrogen bond acceptors (HBA ≤ 3), polar surface area (PSA = 30–80 Å²), rotatable bonds (≤ 2), moderate hydrophobicity (cLogP = 1–3.5), no strongly ionizable groups, and both appropriate rigidity and conformational flexibility to adapt to the dynamic changes of the pocket. Meanwhile, combined with the results of principal moment of inertia (PMI) analysis, fragments with high 3D diversity were obtained. Such fragments have good shape complementarity with allosteric pockets, ensuring that the fragments can smoothly enter the allosteric pockets and form stable binding, while providing room for subsequent optimization and derivation.

This library contains 1,800 structurally diverse fragment molecules with excellent drug-like properties, suitable for allosteric drug development and the design and optimization of allosteric sites. It combines the

Cat. No.	Product Name	Type

HY-D0041

Calcein-AM

80+ Cited Publications

Calcein acetoxymethyl ester

Fluorescent Dyes

Calcein AM, has cell membrane permeability and can easily enter the cell. Calcein AM has no fluorescence and is hydrolyzed by endogenous esterase in the cell to produce polar molecule Calcein (Calcein), which has strong negative charge and cannot permeate the cell membrane. Calcein can emit strong green fluorescence, so it is often used with Propidium Iodide for cell viability/virulence detection, excitation/emission wavelength: 494/515 nm .

HY-DY1036

Calcein-AM (solution)

Fluorescent Dyes

Calcein AM (solution) , has cell membrane permeability and can easily enter the cell. Calcein AM has no fluorescence and is hydrolyzed by endogenous esterase in the cell to produce polar molecule Calcein (Calcein) , which has strong negative charge and cannot permeate the cell membrane. Calcein can emit strong green fluorescence, so it is often used with Propidium Iodide for cell viability/virulence detection, excitation/emission wavelength: 494/515 nm .
Solvent and concentration: DMSO: 2 mM

HY-W013967

1,6-Diphenylhexa-1,3,5-triene

Fluorescent Dyes

1,6-Diphenylhexa-1,3,5-triene is a membrane intercalator and hydrophobic fluorescent probe. 1,6-Diphenylhexa-1,3,5-triene intercalates into the non-polar region of lipid bilayers of adipocyte membranes with probe/membrane equilibrium affected by temperature, probe concentration, and membrane concentration. 1,6-Diphenylhexa-1,3,5-triene’s fluorescence intensity correlating with adipocyte membrane probe incorporation (Ex/Em = 350/452 nm) .

HY-W248583

Pyrromethene 650 PM650	Fluorescent Dyes
Pyrromethene 650 (PM650) is a green-fluorescent polar tracer dye. It is used for investigations of membrane fusion, lysis, and gap-junctional communication and to detect volume changes in cells or liposomes.

HY-D1190

DC271

Fluorescent Dyes

DC271 is a RAR agonist and synthetic retinoid that binds to the retinoid-binding site of cellular retinoic acid-binding protein II (CRBP-II). DC271 exhibits solvatochromic fluorescence properties: it produces intense blue-shifted emission in nonpolar environments and weak red-shifted emission in polar environments, and its severe fluorescence quenching in aqueous solutions can be reversed by embedding in the hydrophobic retinoid-binding protein pocket. DC271 enables direct detection of the binding between unlabeled compounds and related retinoid-binding proteins via fluorescence competition assays (Ex/Em = 355 nm/460 nm) .

HY-D1777

Pyrromethene 605 PM605	Fluorescent Dyes
Pyrromethene 605 (PM605) is a green-fluorescent polar tracer dye. It is used for investigations of membrane fusion, lysis, and gap-junctional communication and to detect volume changes in cells or liposomes.

HY-D1672

TMR Biocytin	Fluorescent Dyes
TMR Biocytin is a polar tracer used in the research of cell-cell and cell-liposome fusions, as well as membrane permeability and cellular uptake during pinocytosis. TMR Biocytin can be detected using streptavidin, and is an effective neuronal tracer in live tissue (Ex=544 nm, Em=571 nm) .

HY-W248118

Pyrromethene 556 PM556	Fluorescent Dyes
Pyrromethene 556 (PM556) is a green-fluorescent polar tracer dye. It is used for investigations of membrane fusion, lysis, and gap-junctional communication and to detect volume changes in cells or liposomes.

HY-D1767

Tempocholine	Fluorescent Dyes
Tempocholine is a polar tracer.

HY-D1754

Lucifer yellow CH ammonium LYCH ammonium	Fluorescent Dyes
Lucifer yellow CH (LYC) ammonium is a thiol-reactive fluorescent polar tracer.

HY-W020798

1-Palmitoyl-2-[3-(diphenylhexatriene)propanoyl]-sn-phosphatidylcholine	Fluorescent Dyes
1-Palmitoyl-2-[3-(diphenylhexatriene)propanoyl]-sn-phosphatidylcholine is a fluorescent probe with a polar phosphatidylethanolamine head group for the determination of surface lipid oxidation in lipoproteins and plasma .

HY-D1757

Lucifer yellow ethylenediamine LYen; PAsp- LY	Fluorescent Dyes
Lucifer yellow ethylenediamine (LYen; PAsp- LY) is a polar tracer that can be coupled with aldehydes and ketones to form Schiff bases, which can be reduced to stable amine derivatives by sodium borohydride (NaBH4) or sodium cyanide borohydride (NaCNH3).

HY-D1745

Liptracker-Green fac-[Re(CO)3(phen)L]	Fluorescent Dyes
Liptracker-green (fac-[Re(CO)3(phen)L]) is a cell-permeable fluorogenic probe that localizes to polar lipids, and can be used to label lipid droplets and other high lipid-content compartments in live and fixed cells using fluorescent microscopy.

HY-B0399G

L-Carnitine

(R)-Carnitine; Levocarnitine

Fluorescent Dyes

L-Carnitine (GMP) is L-Carnitine (HY-B0399) produced by using GMP guidelines. GMP small molecules work appropriately as an auxiliary reagent for cell therapy manufacture. L-Carnitine, a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine is an antioxidant. L-Carnitine can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-D2938

BG-PEG11-Cya-NR	Fluorescent Dyes
BG-PEG11-Cya-NR is a high-performance, non washable, fluorescent opening probe. BG-PEG11-Cya-NR has very weak fluorescence in polar environments (such as aqueous solutions), while its fluorescence is significantly enhanced in non-polar environments (such as the lipid bilayer of cell membranes) .

Cat. No.	Product Name	Type

HY-Y0320

Dimethyl sulfoxide, meets analytical specification of Ch.P.

340+ Cited Publications

DMSO, meets analytical specification of Ch.P.

Biochemical Assay Reagents

Dimethyl sulfoxide (DMSO), meets analytical specification of Ch.P. is an aprotic solvent that dissolves polar and non-polar compounds, including water-insoluble therapeutic and toxic agents. Dimethyl sulfoxide (DMSO) has a strong affinity for water and can rapidly penetrate or enhance the penetration of other substances into biological membranes. Dimethyl sulfoxide also has potential free radical scavenging and anticholinesterase effects and may affect coagulation activity. Dimethyl sulfoxide also induces histamine release from mast cells but is thought to have low systemic toxicity. Dimethyl sulfoxide also exhibits antifreeze and antibacterial properties .
MCE provides Dimethyl sulfoxide that complies with the inspection standards (Ch.P) of Part 4 of the Chinese Pharmacopoeia (2020 Edition). Amicrobic, low endotoxin, can be used in various biochemical experiments such as drug dissolution.

HY-101461

Methyl-β-cyclodextrin 105+ Cited Publications Methyl-beta-cyclodextrin	Biochemical Assay Reagents
Methyl-β-cyclodextrin (Methyl-beta-cyclodextrin) is a cyclic heptasaccharide used to deliver hydrophobic agents based on its property of solubilizing non-polar substances. Methyl-β-cyclodextrin is also extensively used as a cholesterol-depleting reagent . Methyl-β-cyclodextrin strongly reduces clathrin-dependent endocytosis . Methyl-β-cyclodextrin blocks cell migrasome formation .

HY-Y1275

N-Methylpyrrolidone NMP; 1-Methyl-2-pyrrolidinone	Biochemical Assay Reagents
N-Methylpyrrolidone (1-Methyl-2-pyrrolidinone), a five-membered cyclic amide, is an orally active organic polar solvent with teratogenicity and toxicity. N-Methylpyrrolidone is low in acute toxicity with a LD₅₀ value of 3914 mg/kg in rats and of 4050 mg/kg in mice. N-Methylpyrrolidone is extensively used in the manufacture of adhesives, paints, fuels, and pharmaceuticals .

HY-W110551

2-Methacryloyloxyethyl phosphorylcholine

Biochemical Assay Reagents

2-Methacryloyloxyethyl phosphorylcholine is a polymer monomer containing a phospholipid polar group. 2-Methacryloyloxyethyl phosphorylcholine polymers modify the surface properties of materials and reduce protein-surface interactions, reduce IL-8 production, inhibit cell, Staphylococcus aureus, and Porphyromonas gingivalis adhesion. 2-Methacryloyloxyethyl phosphorylcholine is used in the study of medical device-associated infections, periodontitis, and dental caries .

HY-Y0873L

PEG800 Polyethylene glycol 800	Biochemical Assay Reagents
PEG800 (Polyethylene glycol 800) is a nonionic surfactant that is soluble in water and many polar solvents .

HY-Y0971

Tetrabutylammonium fluoride (solution),1M in THF

TBAF

Biochemical Assay Reagents

Tetrabutylammonium fluoride is an organic compound containing both ammonium and fluorine functional groups. It is commonly used as a reagent in various chemical synthesis applications, especially as a source of fluoride ions for nucleophilic reactions. Tetrabutylammonium fluoride has several properties that make it suitable for these applications, including its high solubility in polar solvents and its ability to selectively activate certain chemical bonds. In addition, it can be used as a catalyst for organic reactions and as an electrolyte for batteries.

HY-W105518

L-Carnitine tartrate

15+ Cited Publications

Biochemical Assay Reagents

L-Carnitine tartrate is a highly polar, small zwitterion. L-Carnitine tartrate is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine tartrate functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine tartrate is an antioxidant. L-Carnitine tartrate can ameliorate metabolic imbalances in many inborn errors of metabolism ^{[3] ^.}

HY-21226

Levoglucosenone	Biochemical Assay Reagents
Levoglucosenone Levoglucosenone has unique chemical properties that make it an important intermediate in the production of a wide variety of chemicals, including pharmaceuticals, fragrances and flavorings. Due to its ability to dissolve polar and non-polar compounds, it can also be used as a solvent or fuel additive.

HY-Y0320R

Dimethyl sulfoxide (Standard) 1 Publications Verification DMSO, meets analytical specification of Ch.P. (Standard)	Biochemical Assay Reagents
Dimethyl sulfoxide (Standard) is the analytical standard of Dimethyl sulfoxide. This product is intended for research and analytical applications. Dimethyl sulfoxide (DMSO) is an aprotic solvent that dissolves both polar and nonpolar compounds. Dimethyl sulfoxide has anti-freezing and bacteriostatic properties .

HY-174940

E. coli Extract Polar	Biochemical Assay Reagents
E. coli Extract Polar is a polar lipid extract of Escherichia coli containing phosphatidylethanolamine, phosphatidylglycerol, and cardiolipin for reconstitution of membrane proteins.

HY-144012

DPPE-PEG2000 ammonium

16:0 PEG2000 PE ammonium; 1,2-Dipalmitoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000] ammonium

Biochemical Assay Reagents

DPPE-PEG2000 ammonium (16:0 PEG5000 PE) is a polymer-lipid conjugate and LipoParticle stabilizer with a PEG chain of 5,000 g/mol molecular weight attached to its polar head, and it can be internalized by biological membranes. DPPE-PEG2000 ammonium enables LipoParticle to maintain colloidal stability after 20-fold dilution in PBS or cell culture medium, and prevents aggregate formation during lyophilization and rehydration. DPPE-PEG2000 ammonium helps enhance the non-cytotoxic property of LipoParticle formulations against human osteoblasts. DPPE-PEG2000 ammonium serves as a PEG lipid functional end group for synthesizing liposomes (LPs), is used in the design of conjugated polymer nanoparticles, and applies to research related to bone and joint infections .

HY-W010795

Tetraheptylammonium bromide (>98%,BC)

Biochemical Assay Reagents

Tetraheptylammonium bromide (>98%,BC) (THAB) is a quaternary ammonium compound commonly used as a phase transfer catalyst in organic synthesis reactions, especially those involving charged species or polar reagents. It can facilitate the transfer of reactants between two immiscible phases, such as water and organic solvents, by forming stable ion pairs. In addition, THAB is used as a surfactant, and as an additive in various products such as cosmetics, pharmaceuticals, and detergents. Due to THAB's ability to form complexes with these ions, its potential use in the removal of heavy metal ions from wastewater was also investigated.

HY-144012H

DPPE-PEG5000

16:0 PEG5000 PE; 1,2-Dipalmitoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-5000] ammonium

Biochemical Assay Reagents

DPPE-PEG5000 (16:0 PEG5000 PE) is a polymer-lipid conjugate and LipoParticle stabilizer with a PEG chain of 5,000 g/mol molecular weight attached to its polar head, and it can be internalized by biological membranes. DPPE-PEG5000 enables LipoParticle to maintain colloidal stability after 20-fold dilution in PBS or cell culture medium, and prevents aggregate formation during lyophilization and rehydration. DPPE-PEG5000 helps enhance the non-cytotoxic property of LipoParticle formulations against human osteoblasts. DPPE-PEG5000 serves as a PEG lipid functional end group for synthesizing liposomes (LPs), is used in the design of conjugated polymer nanoparticles, and applies to research related to bone and joint infections .

HY-Y1155

Hexamethylphosphoramide

HMPA

Biochemical Assay Reagents

Hexamethylphosphoramide is an orally active polar aprotic solvent, flame retardant additive, and carcinogen. Hexamethylphosphoramide undergoes cytochrome P-450-mediated N-demethylation to Formaldehyde. Hexamethylphosphoramide induces DNA-protein crosslinks. Hexamethylphosphoramide has been linked to nasal tumors (squamous cell carcinoma, adenoid squamous cell carcinoma), squamous metaplasia, rhinitis, tracheitis, and reversible and irreversible infertility .

HY-123622

CYMAL-5, 98% (TLC)

Biochemical Assay Reagents

CYMAL-5, 98% (TLC) is a cycloalkyl aliphatic saccharide. CYMAL-5, 98% (TLC) is a glycosidic surfactant (GS) with a chiral maltose polar head group and a cyclohexyl-pentyl hydrophobic tail. CYMAL-5, 98% (TLC) is a non-ionic detergent that has a tenfold lower critical micelle concentration (CMC) in comparison with OG, and has previously been used for membrane protein extraction or crystallization of membrane proteins for X-ray crystallographic studies .

HY-W010361

Tetramethylammonium acetate

Biochemical Assay Reagents

Tetramethylammonium acetate is an organic compound commonly used as a phase transfer catalyst in organic synthesis reactions, especially those involving charged species or polar reagents. It can facilitate the transfer of reactants between two immiscible phases, such as water and organic solvents, by forming stable ion pairs. Additionally, Tetramethylammonium acetate has been used to prepare a variety of organic compounds, including esters, amides, and carboxylic acids. Due to its unique physicochemical properties, it has also been investigated for its potential use in developing new materials such as ionic liquids and liquid crystals. "x" in the formula represents the number of water molecules in the crystal structure, which can vary depending on the preparation method.

HY-170221

Chol-C10-PC	Biochemical Assay Reagents
Chol-C10-PC is a cholesterol phosphorylation choline with a hydrophobic region and a large polar head group.

HY-W440681

C13-112-tri-tail	Biochemical Assay Reagents
C13-112-tri-tail is a cationic lipid-like compound containing a polar amino alcohol head group, three hydrophobic carbon-13 tails, and a PEG2 linker. C13-112-tri-tail can be formulated into a lipid nanoparticle (LNP).

HY-W440684

C13-113-tetra-tail	Biochemical Assay Reagents
C13-113-tetra tail is a cationic lipid-like compound containing a polar amino alcohol head group, four hydrophobic carbon-13 tails, and a tertiary amine linker. C13-113-tetra tail can be formulated into a lipid nanoparticle (LNP).

HY-W440683

C13-112-tetra-tail	Biochemical Assay Reagents
C13-112-tetra-tail is a cationic lipid-like compound containing a polar amino alcohol head group, four hydrophobic carbon-13 tails, and a PEG2 linker. C13-112-tetra-tail can be formulated into a lipid nanoparticle (LNP).

HY-W440682

C13-113-tri-tail	Biochemical Assay Reagents
C13-113-tri tail is a cationic lipid-like compound containing a polar amino alcohol head group, three hydrophobic carbon-13 tails, and a tertiary amine linker. C13-113-tri tail can be formulated into a lipid nanoparticle (LNP).

HY-B0399G

L-Carnitine

(R)-Carnitine; Levocarnitine

Biochemical Assay Reagents

HY-W105518R

L-Carnitine tartrate (Standard)

Biochemical Assay Reagents

L-Carnitine (tartrate) (Standard) is the analytical standard of L-Carnitine (tartrate). This product is intended for research and analytical applications. L-Carnitine tartrate is a highly polar, small zwitterion. L-Carnitine tartrate is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine tartrate functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine tartrate is an antioxidant. L-Carnitine tartrate can ameliorate metabolic imbalances in many inborn errors of metabolism ^{[3] ^.}

Cat. No.	Product Name	Target	Research Area

HY-W141932

N-Stearoylglycine Stearoylglycine; N-Octadecanoylglycine	Endogenous Metabolite	Others
N-stearoylglycine is a lipid and has a small ionizable polar headgroup whose charge is pH dependent and whose amide moiety can form H-bonded network between adjacent molecules in ordered films .

HY-40118

Boc-Pro-OMe Boc-L-proline methyl ester	Liposome	Others
Boc-Pro-OMe (Boc-L-proline methyl ester) is a lipid compound that can be used for liposome preparation. Liposomes are the main component of vesicles with concentric phospholipid bilayer membranes, which can be used to construct drug delivery systems for anti-cancer and anti-infection fields. Highly polar water-soluble loads can be captured in the internal aqueous space of liposomes, while lipophilic loads can be distributed into the lipid bilayer and become part of the lipid bilayer. Especially for the delivery of antisense oligonucleotides, it can overcome the problems of inefficient cellular uptake and rapid loss in the body.

HY-P11551

Histone H4 peptide	Histone Acetyltransferase	Cancer
Histone H4 peptide is a peptide that interacts with hNatD. Histone H4 peptide exhibits polar interactions with hNatD. Histone H4 peptide can be used in lung cancer research .

HY-P1609

CP-69799	Renin Enteropeptidase	Cardiovascular Disease
CP-69799 is an azahomostatine-containing oligopeptide transition-state analogue inhibitor with a hog renin IC₅₀ of 6e-9 M, human plasma renin IC₅₀ of 3e-7 M and K_i of 0.310 μM, and endothiapepsin K_i of 0.27 μM. CP-69799 binds endothiapepsin’s active site cleft in extended conformation, fills S4 to S3' pockets, displaces native solvent molecules, induces domain rotation, and reduces thermal mobility of endothiapepsin’s flap and helix regions. CP-69799 acts as a transition-state analogue inhibitor of hog renin and human plasma renin. CP-69799 contains a polar lysine residue at the P2' position, with a nitrogen atom replacing the P1' Cα atom of the hydroxyethylene dipeptide isostere. CP-69799 can be used for the research of hypertension .

Cat. No.	Product Name	Category	Target	Chemical Structure

HY-B0399

L-Carnitine Maximum Cited Publications 20 Publications Verification (R)-Carnitine; Levocarnitine	Natural Products Human Gut Microbiota Metabolites Immune System Disorder Microorganisms Neurological Disease Disease markers Endocrine diseases Nervous System Disorder Endogenous metabolite Disease Research Fields Cancer Source Classification	Endogenous Metabolite
L-Carnitine ((R)-Carnitine), a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine is an antioxidant. L-Carnitine can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-W008566

Norharmane Norharman; β-Carboline	Neurological Disease Classification of Application Fields Pyridine Alkaloids Endogenous metabolite Biological Pesticide Research Indole Alkaloids Agricultural Research Infection Alkaloids Microorganisms Disease Research Fields Source Classification Cancer	Monoamine Oxidase Endogenous Metabolite
Norharmane (Norharman), a β-carboline alkaloid, is a potent and reversible monoamine oxidase inhibitor, with IC₅₀ values of 6.5 and 4.7 μM for MAO-A and MAO-B, respectively. Norharmane causes antidepressant responses. Norharmane is also a prospective anti-cancer photosensitizer. Norharmane alters polar auxin transport (PAT) by inhibiting PIN2, PIN3 and PIN7 transport proteins, thus causing a significant inhibitory effect on the growth of Arabidopsis thaliana seedlings .

HY-B2246

L-Carnitine hydrochloride Maximum Cited Publications 20 Publications Verification (R)-Carnitine hydrochloride; Levocarnitine hydrochloride	Classification of Application Fields Ketones, Aldehydes, Acids Metabolic Disease Endogenous metabolite Disease Research Fields Source Classification	Endogenous Metabolite
L-Carnitine hydrochloride ((R)-Carnitine hydrochloride), a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine hydrochloride functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine hydrochloride is an antioxidant. L-Carnitine hydrochloride can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-113116

Sphinganine 1-phosphate 1 Publications Verification D-erythro-Dihydrosphingosine 1-phosphate	Natural Products Human Gut Microbiota Metabolites Microorganisms Classification of Application Fields Endogenous metabolite Inflammation/Immunology Disease Research Fields Source Classification Cancer	Endogenous Metabolite
Sphinganine 1-phosphate (D-erythro-Dihydrosphingosine 1-phosphate) is a polar sphingolipid metabolite that regulates cell migration, differentiation, survival and complex physiological processes .

HY-Y0320R

Dimethyl sulfoxide (Standard) 1 Publications Verification DMSO, meets analytical specification of Ch.P. (Standard)	Microorganisms Source Classification	Reference Standards Cholinesterase (ChE) Bacterial
Dimethyl sulfoxide (Standard) is the analytical standard of Dimethyl sulfoxide. This product is intended for research and analytical applications. Dimethyl sulfoxide (DMSO) is an aprotic solvent that dissolves both polar and nonpolar compounds. Dimethyl sulfoxide has anti-freezing and bacteriostatic properties .

HY-B0399R

L-Carnitine (Standard) (R)-Carnitine (Standard); Levocarnitine (Standard)	Structural Classification Natural Products Human Gut Microbiota Metabolites Immune System Disorder Microorganisms Disease markers Endocrine diseases Nervous System Disorder Endogenous metabolite Cancer Source Classification	Reference Standards Endogenous Metabolite
L-Carnitine (Standard) is the analytical standard of L-Carnitine. This product is intended for research and analytical applications. L-Carnitine ((R)-Carnitine), a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine is an antioxidant. L-Carnitine can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-N10510

Blood group A antigen tetraose type 5 A-Tetrasaccharide	Structural Classification Polysaccharides Classification of Application Fields Other Diseases Endogenous metabolite Disease Research Fields Saccharides	Others
Blood group A antigen tetraose type 5 (A-Tetrasaccharide) is a tetrasaccharide and a blood group specific oligosaccharide, inhibits the binding of anti-A antibody to blood group A substance. Blood group A antigen tetraose type 5 can be isolated from polar bear milk samples .

HY-B2246R

L-Carnitine hydrochloride (Standard) (R)-Carnitine hydrochloride (Standard); Levocarnitine hydrochloride (Standard)	Structural Classification Ketones, Aldehydes, Acids Endogenous metabolite Source Classification	Reference Standards Endogenous Metabolite
L-Carnitine (hydrochloride) (Standard) is the analytical standard of L-Carnitine (hydrochloride). This product is intended for research and analytical applications. L-Carnitine hydrochloride ((R)-Carnitine hydrochloride), a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine hydrochloride functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine hydrochloride is an antioxidant. L-Carnitine hydrochloride can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-W750700

Dihydroxylycopene 1,1'-Dihydroxylycopene	Natural Products Microorganisms Source Classification	Endogenous Metabolite
Dihydroxylycopene is a polar carotenoid that is essential for photosynthesis in phototrophic bacteria. Dihydroxylycopene is an essential carotenoid in Phaeospirillum .

HY-N4275

Oleaside A	Apocynaceae Classification of Application Fields Cardiacglycosides Nerium indicum Mill. Plants Disease Research Fields Steroids Source Classification Cancer	Others
Oleaside A is a polar cardenolide monoglycoside isolated from Nerium oleander, inhibits the induction of ICAM-1 induced by IL-1α and TNF-α, and has anti-tumor activity .

HY-N2687

5-n-Tricosylresorcinol	Microorganisms Classification of Application Fields Other Diseases Phenols Polyphenols Disease Research Fields Source Classification	DNA/RNA Synthesis
5-n-Tricosylresorcinolthe is the first cyst lipid. 5-n-Tricosylresorcinolthe has metahydroxyl group which allows it to self-associate forming a staggered-chain conformation in which the polar head groups have heaxagonal symmetry. 5-n-Tricosylresorcinolthe reduces hydrogen peroxide-induced DNA damage .

HY-W008566R

Norharmane (Standard) Norharman (Standard); β-Carboline (Standard)	Alkaloids Structural Classification Microorganisms Pyridine Alkaloids Endogenous metabolite Indole Alkaloids Source Classification	Reference Standards Monoamine Oxidase Endogenous Metabolite
Norharmane (Standard) is the analytical standard of Norharmane. This product is intended for research and analytical applications. Norharmane (Norharman), a β-carboline alkaloid, is a potent and reversible monoamine oxidase inhibitor, with IC50 values of 6.5 and 4.7 μM for MAO-A and MAO-B, respectively. Norharmane causes antidepressant responses. Norharmane is also a prospective anti-cancer photosensitizer. Norharmane alters polar auxin transport (PAT) by inhibiting PIN2, PIN3 and PIN7 transport proteins, thus causing a significant inhibitory effect on the growth of Arabidopsis thaliana seedlings .

HY-N12551

2-O-β-D-Glucopyranosylcucurbitacin F 25-acetate	Triterpenes Structural Classification Tetracyclic Triterpenoids Terpenoids Rubiaceae Plants Exostema mexicanum Gray Source Classification	Others
2-O-β-D-Glucopyranosylcucurbitacin F 25-acetate is a cucurbitacin glucoside that can isolated from the more polar fractions of the MeOH extract of Cigarrilla mexicana .

Cat. No.	Product Name	Chemical Structure

HY-B2246S

L-Carnitine-d9 chloride

1 Publications Verification

L-Carnitine-d₉ (chloride)e is the deuterium labeled L-Carnitine chloride. L-Carnitine chloride, a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine chloride functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine chloride is an antioxidant. L-Carnitine chloride can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-Y1275S

N-Methylpyrrolidone-d9

N-Methylpyrrolidone-d₉ (NMP-d₉) is deuterium labeled N-Methylpyrrolidone. N-Methylpyrrolidone (1-Methyl-2-pyrrolidinone), a five-membered cyclic amide, is an orally active organic polar solvent with teratogenicity and toxicity. N-Methylpyrrolidone is low in acute toxicity with a LD₅₀ value of 3914 mg/kg in rats and of 4050 mg/kg in mice. N-Methylpyrrolidone is extensively used in the manufacture of adhesives, paints, fuels, and pharmaceuticals .

HY-Y1275S1

N-Methylpyrrolidone-d3
N-Methylpyrrolidone-d₃ is the deuterium labeled N-Methylpyrrolidone . N-Methylpyrrolidone (1-Methyl-2-pyrrolidinone), a five-membered cyclic amide, is an organic polar solvent. N-Methylpyrrolidone is extensively used in the manufacture of adhesives, paints, fuels, and pharmaceuticals .

HY-B0399S2

L-Carnitine-13C3

L-Carnitine- ¹³C₃ ((R)-Carnitine- ¹³C₃) is the ¹³C--labeled L-Carnitine (HY-B0399). L-Carnitine ((R)-Carnitine), a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine is an antioxidant. L-Carnitine can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-113116S

Sphinganine 1-phosphate-d7
Sphinganine 1-phosphate-d₇ is deuterium labeled Sphinganine 1-phosphate. Sphinganine 1-phosphate (D-erythro-Dihydrosphingosine 1-phosphate) is a polar sphingolipid metabolite that regulates cell migration, differentiation, survival and complex physiologic

HY-Y1155S

Hexamethylphosphoramide-d18

Hexamethylphosphoramide-d₁₈ is the deuterium labeled Hexamethylphosphoramide (HY-Y1155). Hexamethylphosphoramide is an orally active polar aprotic solvent, flame retardant additive, and carcinogen. Hexamethylphosphoramide undergoes cytochrome P-450-mediated N-demethylation to Formaldehyde. Hexamethylphosphoramide induces DNA-protein crosslinks. Hexamethylphosphoramide has been linked to nasal tumors (squamous cell carcinoma, adenoid squamous cell carcinoma), squamous metaplasia, rhinitis, tracheitis, and reversible and irreversible infertility .

HY-W700241

Norharman-d7

Norharman-d₇ is deuterium labeled Norharmane. Norharmane (Norharman), a β-carboline alkaloid, is a potent and reversible monoamine oxidase inhibitor, with IC₅₀ values of 6.5 and 4.7 μM for MAO-A and MAO-B, respectively. Norharmane causes antidepressant responses. Norharmane is also a prospective anti-cancer photosensitizer. Norharmane alters polar auxin transport (PAT) by inhibiting PIN2, PIN3 and PIN7 transport proteins, thus causing a significant inhibitory effect on the growth of Arabidopsis thaliana seedlings .

HY-178412S

Isopropyl myristate-d27
Isopropyl myristate-d₂₇ is the deuterium labeled Isopropyl myristate (HY-124190). Isopropyl myristate (IPM) is the ester of isopropyl alcohol and myristic acid. Isopropyl myristate is used for transdermal delivery of some compounds. Isopropyl myristate is a polar emollient and is used in cosmetic and topical medicinal preparations where good absorption into the skin is desired .

HY-124891S

1-Phenylpyrrole-d9
1-Phenylpyrrole-d9 (N-Phenylpyrrole-d9) is the deuterium labeled 1-Phenylpyrrole (HY-124891). 1-Phenylpyrrole (N-Phenylpyrrole) has dual fluorescent properties. 1-Phenylpyrrole displays a single band in nonpolar solvents and a second red-shifted fluorescent band in polar solvents .

HY-W754236

(R)-Carnitine Hydrochloride-13C3

(R)-Carnitine Hydrochloride- ¹³C₃ is the ¹³C-labeled L-Carnitine hydrochloride (HY-B2246). L-Carnitine hydrochloride ((R)-Carnitine hydrochloride), a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine hydrochloride functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine hydrochloride is an antioxidant. L-Carnitine hydrochloride can ameliorate metabolic imbalances in many inborn errors of metabolism .

HY-W008566S

Norharmane-13C

Norharmane- ¹³C (Norharman- ¹³C) is the ¹³C-labeled Norharmane (HY-W008566). Norharmane (Norharman), a β-carboline alkaloid, is a potent and reversible monoamine oxidase inhibitor, with IC₅₀ values of 6.5 and 4.7 μM for MAO-A and MAO-B, respectively. Norharmane causes antidepressant responses. Norharmane is also a prospective anti-cancer photosensitizer. Norharmane alters polar auxin transport (PAT) by inhibiting PIN2, PIN3 and PIN7 transport proteins, thus causing a significant inhibitory effect on the growth of Arabidopsis thaliana seedlings .

Cat. No.	Product Name		Classification

HY-101532

6A-Azido-6A-deoxy-β-cyclodextrin β-CDN3; 6A-deoxy-6A-azido-β-cyclodextrin		Azide
6A-Azido-6A-deoxy-β-cyclodextrin (β-CDN3) is a site-specifically modified β-cyclodextrin with a single azido group replacing the hydroxyl group at the C6 position. 6A-Azido-6A-deoxy-β-cyclodextrin forms a host-guest inclusion complex with Dexamethasone (HY-14648), localizing the drug within its hydrophobic cavity, which restricts the rotational mobility of the drug and places Dexamethasone in a less polar environment. 6A-Azido-6A-deoxy-β-cyclodextrin acts as a coupling agent to graft β-cyclodextrin onto thermosensitive nanogels via strain-promoted alkyne-azide cycloaddition (SPAAC). 6A-Azido-6A-deoxy-β-cyclodextrin also serves as a click chemistry reagent. It contains an azide group and undergoes copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules bearing an alkyne group. It also undergoes strain-driven alkyne-azide cycloaddition (SPAAC) with molecules containing DBCO or BCN groups .

Cat. No.	Product Name		Classification

HY-Y0320

Dimethyl sulfoxide, meets analytical specification of Ch.P. 340+ Cited Publications DMSO, meets analytical specification of Ch.P.		Solvents
Dimethyl sulfoxide (DMSO), meets analytical specification of Ch.P. is an aprotic solvent that dissolves polar and non-polar compounds, including water-insoluble therapeutic and toxic agents. Dimethyl sulfoxide (DMSO) has a strong affinity for water and can rapidly penetrate or enhance the penetration of other substances into biological membranes. Dimethyl sulfoxide also has potential free radical scavenging and anticholinesterase effects and may affect coagulation activity. Dimethyl sulfoxide also induces histamine release from mast cells but is thought to have low systemic toxicity. Dimethyl sulfoxide also exhibits antifreeze and antibacterial properties . MCE provides Dimethyl sulfoxide that complies with the inspection standards (Ch.P) of Part 4 of the Chinese Pharmacopoeia (2020 Edition). Amicrobic, low endotoxin, can be used in various biochemical experiments such as drug dissolution.

HY-157950

DSPE-PEG2000-triGalNAc ammonium		Pegylated Lipids
DSPE-PEG2K-triGalNAc ammonium is a polar lipid composed of DSPE and tri-N-acetylgalactosamine that can be used to construct liposomes target to asialoglycoprotein receptor (ASGPR).

HY-124190

Isopropyl myristate		Solvents
Isopropyl myristate (IPM) is the ester of isopropyl alcohol and myristic acid. Isopropyl myristate is used for transdermal delivery of some compounds. Isopropyl myristate is a polar emollient and is used in cosmetic and topical medicinal preparations where good absorption into the skin is desired .

HY-144012

DPPE-PEG2000 ammonium 16:0 PEG2000 PE ammonium; 1,2-Dipalmitoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000] ammonium		Pegylated Lipids
DPPE-PEG2000 ammonium (16:0 PEG5000 PE) is a polymer-lipid conjugate and LipoParticle stabilizer with a PEG chain of 5,000 g/mol molecular weight attached to its polar head, and it can be internalized by biological membranes. DPPE-PEG2000 ammonium enables LipoParticle to maintain colloidal stability after 20-fold dilution in PBS or cell culture medium, and prevents aggregate formation during lyophilization and rehydration. DPPE-PEG2000 ammonium helps enhance the non-cytotoxic property of LipoParticle formulations against human osteoblasts. DPPE-PEG2000 ammonium serves as a PEG lipid functional end group for synthesizing liposomes (LPs), is used in the design of conjugated polymer nanoparticles, and applies to research related to bone and joint infections .

HY-144012H

DPPE-PEG5000 16:0 PEG5000 PE; 1,2-Dipalmitoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-5000] ammonium		Pegylated Lipids
DPPE-PEG5000 (16:0 PEG5000 PE) is a polymer-lipid conjugate and LipoParticle stabilizer with a PEG chain of 5,000 g/mol molecular weight attached to its polar head, and it can be internalized by biological membranes. DPPE-PEG5000 enables LipoParticle to maintain colloidal stability after 20-fold dilution in PBS or cell culture medium, and prevents aggregate formation during lyophilization and rehydration. DPPE-PEG5000 helps enhance the non-cytotoxic property of LipoParticle formulations against human osteoblasts. DPPE-PEG5000 serves as a PEG lipid functional end group for synthesizing liposomes (LPs), is used in the design of conjugated polymer nanoparticles, and applies to research related to bone and joint infections .

HY-157666

13:0 PC PC(13:0/13:0); DTPC		Phospholipids
13:0 PC (PC(13:0/13:0)), also known as ditridecanoyl phosphatidyl choline (DTPC), is a phospholipid characterized by its unique structure that includes a polar head with a positively charged quaternary amine and a negatively charged phosphate, along with two non-polar fatty acid tails.

HY-157624

1-Stearoyl-2-docosahexaenoyl-sn-glycero-3-phosphoethanolamine 18:0-22:6 PE		Phospholipids
1-Stearoyl-2-docosahexaenoyl-sn-glycero-3-phosphoethanolamine (18:0-22:6 PE) is a lipid compound that can be used for liposome preparation. Liposomes are the main component of vesicles with concentric phospholipid bilayer membranes, which can be used to construct drug delivery systems for anti-cancer and anti-infection fields. Highly polar water-soluble loads can be captured in the internal aqueous space of liposomes, while lipophilic loads can be distributed into the lipid bilayer and become part of the lipid bilayer. Especially for the delivery of antisense oligonucleotides, it can overcome the problems of inefficient cellular uptake and rapid loss in the body.

HY-17650

DMDHP (±)-Dimyristoyl-2,3-dimethylhydroxypropylamine		Cationic Lipids
DMDHP ((±)-Dimyristoyl-2,3-dimethylhydroxypropylamine) is a cationic lipid with a polar head group containing a dihydroxy group. DMDHP exhibits superior transfection efficiency and lower toxicity at high DNA doses in mouse intrapulmonary transfection model. DMDHP is commonly used for gene delivery .

HY-W591449

DOPE-PEG2000-Azide		Pegylated Lipids
DOPE-PEG2000-Azide is a liposome to simulate biological phospholipid membrane. Liposomes are the main component of vesicles with concentric phospholipid bilayer membranes, which can be used to construct drug delivery systems for anti-cancer and anti-infection fields. Highly polar water-soluble payloads can be trapped in the internal aqueous space of liposomes, while lipophilic payloads can partition into and become part of the lipid bilayer. Especially for delivering antisense oligonucleotides, it can overcome problems such as inefficient cellular uptake and rapid loss in the body .

HY-125734

DMHAPC-Chol		Cationic Lipids Cholesterol
DMHAPC-Chol, a cationic lipid, contains a biodegradable carbamoyl linker and a hydroxyethyl group in the polar amino head moiety. DMHAPC-Chol can be used in both transfection experiments concerning plasmids or siRNA .

HY-W440681

C13-112-tri-tail		Cationic Lipids
C13-112-tri-tail is a cationic lipid-like compound containing a polar amino alcohol head group, three hydrophobic carbon-13 tails, and a PEG2 linker. C13-112-tri-tail can be formulated into a lipid nanoparticle (LNP).

HY-W440684

C13-113-tetra-tail		Cationic Lipids
C13-113-tetra tail is a cationic lipid-like compound containing a polar amino alcohol head group, four hydrophobic carbon-13 tails, and a tertiary amine linker. C13-113-tetra tail can be formulated into a lipid nanoparticle (LNP).

HY-W440683

C13-112-tetra-tail		Cationic Lipids
C13-112-tetra-tail is a cationic lipid-like compound containing a polar amino alcohol head group, four hydrophobic carbon-13 tails, and a PEG2 linker. C13-112-tetra-tail can be formulated into a lipid nanoparticle (LNP).

HY-W440682

C13-113-tri-tail		Cationic Lipids
C13-113-tri tail is a cationic lipid-like compound containing a polar amino alcohol head group, three hydrophobic carbon-13 tails, and a tertiary amine linker. C13-113-tri tail can be formulated into a lipid nanoparticle (LNP).

HY-157694

09:0 Lyso PC		Phospholipids
09:0 Lyso PC is a polar short-chain lysophosphatidylcholine.

HY-157678

1,2-Dilinoleoyl-sn-glycero-3-phospho-L-serine sodium 18:2 PS sodium		Phospholipids
1,2-Dilinoleoyl-sn-glycero-3-phospho-L-serine sodium (18:2 PS sodium) is a lipid compound that can be used for liposome preparation. Liposomes are the main component of vesicles with concentric phospholipid bilayer membranes, which can be used to construct drug delivery systems for anti-cancer and anti-infection fields. Highly polar water-soluble loads can be captured in the internal aqueous space of liposomes, while lipophilic loads can be distributed into the lipid bilayer and become part of the lipid bilayer. Especially for the delivery of antisense oligonucleotides, it can overcome the problems of inefficient cellular uptake and rapid loss in the body.

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-B0399G

L-Carnitine (R)-Carnitine; Levocarnitine	Endogenous Metabolite	Neurological Disease Cancer
L-Carnitine (GMP) is L-Carnitine (HY-B0399) produced by using GMP guidelines. GMP small molecules work appropriately as an auxiliary reagent for cell therapy manufacture. L-Carnitine, a highly polar, small zwitterion, is an essential co-factor for the mitochondrial β-oxidation pathway. L-Carnitine functions to transport long chain fatty acyl-CoAs into the mitochondria for degradation by β-oxidation. L-Carnitine is an antioxidant. L-Carnitine can ameliorate metabolic imbalances in many inborn errors of metabolism .

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