highly reactive molecule

By Targets:	Biochemical Assay Reagents (8) Drug Derivative (1) Fluorescent Dye (3) Microtubule/Tubulin (1) Reference Standards (1)
By Research Areas:	Cancer (1)

Targets Recommended: Reactive Oxygen Species (ROS) Repulsive guidance molecule ALCAM/CD166

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-164165

Paclitaxel-2′-succinate NHS ester	Microtubule/Tubulin Drug Derivative	Cancer
Paclitaxel-2′-succinate NHS ester is a paclitaxel derivative with a succinic acid linker, in which the carboxyl group is activated by the NHS ester. The NHS ester group is highly reactive toward amino or hydroxyl groups and can be used to conjugate with other molecules such as peptides, proteins, antibodies, enzymes or polymers. Paclitaxel-2′-succinate NHS ester can be used in the development of nanomedicines and in the study of cancer therapy .

HY-W190877

Thiol-PEG1-acid SH-PEG1-COOH	Biochemical Assay Reagents	Others
Thiol-PEG1-acid (SH-PEG1-COOH) is a PEG derivative consisting of a thiol (-SH), 1 PEG unit, and a carboxyl (-COOH). The thiol is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. The carboxyl group can easily form stable amide bonds with amino groups, and can also form ester bonds with hydroxyl groups.

HY-W140439R

1-Oleoyl-sn-glycero-3-phosphocholine (Standard) 18:1 Lyso PC (Standard)	Biochemical Assay Reagents Reference Standards	Others
1-Oleoyl-sn-glycero-3-phosphocholine is an unsaturated 18:1 lysophosphatidylcholine formed in plasma by lecithin:cholesterol acyltransferase (LCAT).

HY-174949B

FMOC-NH-PEG3400-SH FMOC-NH-PEG3400-Thiol	Biochemical Assay Reagents	Others
FMOC-NH-PEG3400-SH (FMOC-NH-PEG3400-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-D3049

5(6)-carbonylated rhodamine 110 NHS ester	Fluorescent Dye	Others
5(6)-carbonylated rhodamine 110 NHS ester is a reactive ester fluorescent reagent based on 5(6)-carbonylated rhodamine 110. NHS ester is a highly reactive ester capable of covalently coupling with primary amine groups in molecules such as proteins, peptides, amino sugars, and nucleic acids to form stable amide bonds (Ex/Em = 502/527 nm).

HY-D3050

5(6)-carbonylated rhodamine 110 X NHS ester	Fluorescent Dye	Others
5(6)-carbonylated rhodamine 110 X NHS ester is a reactive ester fluorescent reagent based on 5(6)-carbonylated rhodamine 110 X. NHS ester is a highly reactive ester capable of covalently coupling with primary amine groups in molecules such as proteins, peptides, amino sugars, and nucleic acids to form stable amide bonds (Ex/Em = 496/522 nm).

HY-D3053

5(6)-Rhodamine 6G NHS ester	Fluorescent Dye	Others
5(6)-Rhodamine 6G NHS ester is a reactive ester fluorescent reagent based on Rhodamine 6G (HY-D0309). NHS ester is a highly reactive ester capable of covalently coupling with primary amine groups in molecules such as proteins, peptides, amino sugars, and nucleic acids to form stable amide bonds (Ex/Em = 526/547 nm).

HY-174949C

FMOC-NH-PEG5000-SH FMOC-NH-PEG5000-Thiol	Biochemical Assay Reagents	Others
FMOC-NH-PEG5000-SH (FMOC-NH-PEG5000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-174949D

FMOC-NH-PEG10000-SH FMOC-NH-PEG10000-Thiol	Biochemical Assay Reagents	Others
FMOC-NH-PEG10000-SH (FMOC-NH-PEG10000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-174949

FMOC-NH-PEG1000-SH FMOC-NH-PEG1000-Thiol	Biochemical Assay Reagents	Others
FMOC-NH-PEG1000-SH (FMOC-NH-PEG1000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-174949A

FMOC-NH-PEG2000-SH FMOC-NH-PEG2000-Thiol	Biochemical Assay Reagents	Others
FMOC-NH-PEG2000-SH (FMOC-NH-PEG2000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-29501

Thiol-PEG2-NH2 SH-PEG2-NH2	Biochemical Assay Reagents	Others
Thiol-PEG2-NH2 (SH-PEG2-NH2) is a PEG derivative consisting of a thiol (-SH), 2 PEG units, and NH2. Thiol is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds.

Cat. No.	Product Name

HY-L036

Covalent Screening Library	1,546 compounds
Small molecule covalent inhibitors, or irreversible inhibitors, are a type of inhibitors that exert their biological functions by irreversibly binding to target through covalent bonds. Compared with non-covalent inhibitors, covalent inhibitors have obvious advantages in bioactivity, such that covalent warheads can target rare residues of a particular target protein, thus leading to the development of highly selective inhibitors and achieving a more complete and continued target occupancy in living systems. In recent years, the distinct strengths of covalent inhibitors in overcoming drug resistance had been recognized. However, toxicity can be a real challenge related to this class of therapeutics due to their potential for off-target reactivity and has led to these drugs being disfavored as a drug class. The drug design and optimization of covalent inhibitors has become a hot spot in drug discovery. MCE covalent inhibitor library contains 1,546 small molecules including identified covalent inhibitors and other bioactive molecules having common covalent reactive groups as warheads, such as acrylamides, activated terminal acetylenes, Sulfonyl fluorides/esters, cloracetamides, alkyl halides, epoxides, aziridines, disulfides, etc.

Covalent Screening Library

1,546 compounds

Small molecule covalent inhibitors, or irreversible inhibitors, are a type of inhibitors that exert their biological functions by irreversibly binding to target through covalent bonds. Compared with non-covalent inhibitors, covalent inhibitors have obvious advantages in bioactivity, such that covalent warheads can target rare residues of a particular target protein, thus leading to the development of highly selective inhibitors and achieving a more complete and continued target occupancy in living systems. In recent years, the distinct strengths of covalent inhibitors in overcoming drug resistance had been recognized. However, toxicity can be a real challenge related to this class of therapeutics due to their potential for off-target reactivity and has led to these drugs being disfavored as a drug class. The drug design and optimization of covalent inhibitors has become a hot spot in drug discovery.

MCE covalent inhibitor library contains 1,546 small molecules including identified covalent inhibitors and other bioactive molecules having common covalent reactive groups as warheads, such as acrylamides, activated terminal acetylenes, Sulfonyl fluorides/esters, cloracetamides, alkyl halides, epoxides, aziridines, disulfides, etc.

HY-L036P

Covalent Screening Library Plus	5,994 compounds
Small molecule covalent inhibitors, or irreversible inhibitors, are a type of inhibitors that exert their biological functions by irreversibly binding to target through covalent bonds. Compared with non-covalent inhibitors, covalent inhibitors have obvious advantages in bioactivity, such that covalent warheads can target rare residues of a particular target protein, thus leading to the development of highly selective inhibitors and achieving a more complete and continued target occupancy in living systems. In recent years, the distinct strengths of covalent inhibitors in overcoming drug resistance had been recognized. However, toxicity can be a real challenge related to this class of therapeutics due to their potential for off-target reactivity and has led to these drugs being disfavored as a drug class. The drug design and optimization of covalent inhibitors has become a hot spot in drug discovery. MCE covalent inhibitor library contains 5,994 small molecules including identified covalent inhibitors and other molecules having common covalent reactive groups as warheads, such as acrylamides, activated terminal acetylenes, sulfonyl fluorides/esters, cloracetamides, alkyl halides, epoxides, aziridines, disulfides, etc. MCE Covalent inhibitor Library plus, with more powerful screening capability, further complement Covalent inhibitor Library (HY-L036) by adding some fragment compounds with covalent warheads.

Covalent Screening Library Plus

5,994 compounds

Small molecule covalent inhibitors, or irreversible inhibitors, are a type of inhibitors that exert their biological functions by irreversibly binding to target through covalent bonds. Compared with non-covalent inhibitors, covalent inhibitors have obvious advantages in bioactivity, such that covalent warheads can target rare residues of a particular target protein, thus leading to the development of highly selective inhibitors and achieving a more complete and continued target occupancy in living systems. In recent years, the distinct strengths of covalent inhibitors in overcoming drug resistance had been recognized. However, toxicity can be a real challenge related to this class of therapeutics due to their potential for off-target reactivity and has led to these drugs being disfavored as a drug class. The drug design and optimization of covalent inhibitors has become a hot spot in drug discovery.

MCE covalent inhibitor library contains 5,994 small molecules including identified covalent inhibitors and other molecules having common covalent reactive groups as warheads, such as acrylamides, activated terminal acetylenes, sulfonyl fluorides/esters, cloracetamides, alkyl halides, epoxides, aziridines, disulfides, etc.

MCE Covalent inhibitor Library plus, with more powerful screening capability, further complement Covalent inhibitor Library (HY-L036) by adding some fragment compounds with covalent warheads.

HY-L908

Lead-like Covalent Screening Library	1,248 compounds
Small molecule covalent inhibitors, or irreversible inhibitors, are a type of inhibitors that exert their biological functions by irreversibly binding to target through covalent bonds. Compared with non-covalent inhibitors, covalent inhibitors have obvious advantages in bioactivity, such that covalent warheads can target rare residues of a particular target protein, thus leading to the development of highly selective inhibitors and achieving a more complete and continued target occupancy in living systems. In recent years, the distinct strengths of covalent inhibitors in overcoming drug resistance had been recognized. However, toxicity can be a real challenge related to this class of therapeutics due to their potential for off-target reactivity and has led to these drugs being disfavored as a drug class. The drug design and optimization of covalent inhibitors has become a hot spot in drug discovery. MCE Lead-like Covalent Screening Library offers a valuable resource of 1,049 lead-like compounds with commonly used covalent warheads. These warheads, such as acrylamide, activated terminal alkyne, acyloxymethyl ketone, and boronic acid, are capable of reacting with specific amino acid residues, including cysteine, lysine, serine, and histidine. The inclusion of these reactive warheads in the library allows researchers to explore the potential of covalent inhibition, a powerful approach in drug discovery.

Lead-like Covalent Screening Library

1,248 compounds

Small molecule covalent inhibitors, or irreversible inhibitors, are a type of inhibitors that exert their biological functions by irreversibly binding to target through covalent bonds. Compared with non-covalent inhibitors, covalent inhibitors have obvious advantages in bioactivity, such that covalent warheads can target rare residues of a particular target protein, thus leading to the development of highly selective inhibitors and achieving a more complete and continued target occupancy in living systems. In recent years, the distinct strengths of covalent inhibitors in overcoming drug resistance had been recognized. However, toxicity can be a real challenge related to this class of therapeutics due to their potential for off-target reactivity and has led to these drugs being disfavored as a drug class. The drug design and optimization of covalent inhibitors has become a hot spot in drug discovery.

MCE Lead-like Covalent Screening Library offers a valuable resource of 1,049 lead-like compounds with commonly used covalent warheads. These warheads, such as acrylamide, activated terminal alkyne, acyloxymethyl ketone, and boronic acid, are capable of reacting with specific amino acid residues, including cysteine, lysine, serine, and histidine. The inclusion of these reactive warheads in the library allows researchers to explore the potential of covalent inhibition, a powerful approach in drug discovery.

HY-L945

Sulfonyl Fluoride Fragment Library	1162 compounds
Sulfonyl fluoride (-SO₂F) overcomes the bottleneck of target selectivity in traditional covalent warheads through its unique chemical and biological properties, which rely heavily on cysteine (Cys) residues. Featuring high stability and tunable electrophilicity under physiological conditions, it can target a wide range of nucleophilic residues including lysine (Lys), tyrosine (Tyr), serine (Ser), and histidine (His). It offers the advantages of a broader druggable space, lower off-target risks, and long-lasting efficacy, with numerous reported cases in the research of covalent inhibitors, Molecular glue, PROTACs, and chemical biology probe development. MCE constructs a highly diverse sulfonyl fluoride fragment library based on the reactivity, stability and physiological compatibility of sulfonyl fluoride. The library contains 1000 efficiently synthesized and stable sulfonyl fluoride fragments, which ensure precise reactivity of the warhead and retain sufficient derivatization space for subsequent optimization. Combined with the modular strategy of SuFEx click chemistry, it enables versatile modification of compounds and functionalization of complex molecules, improves the efficiency of structural optimization and rapidly expands druggability, making it suitable for high-throughput probe and custom covalent library construction. It provides an efficient research tool for the development of broad-spectrum covalent inhibitors targeting Lys/Tyr/Ser/His, covalent PROTACs for E3 ligases and chemical biology probe development, meeting the requirements of modern drug research for high throughput, high success rate and high derivatization potential. This library contains 1,162 sulfonyl fluoride fragments with high structural diversity, favorable drug-like properties and tunable electrophilicity. It is well suited for precise targeting of non-Cys residues and meets the criteria of simple structure and high derivatization potential. It effectively improves

Sulfonyl Fluoride Fragment Library

1162 compounds

Sulfonyl fluoride (-SO₂F) overcomes the bottleneck of target selectivity in traditional covalent warheads through its unique chemical and biological properties, which rely heavily on cysteine (Cys) residues. Featuring high stability and tunable electrophilicity under physiological conditions, it can target a wide range of nucleophilic residues including lysine (Lys), tyrosine (Tyr), serine (Ser), and histidine (His). It offers the advantages of a broader druggable space, lower off-target risks, and long-lasting efficacy, with numerous reported cases in the research of covalent inhibitors, Molecular glue, PROTACs, and chemical biology probe development.

MCE constructs a highly diverse sulfonyl fluoride fragment library based on the reactivity, stability and physiological compatibility of sulfonyl fluoride. The library contains 1000 efficiently synthesized and stable sulfonyl fluoride fragments, which ensure precise reactivity of the warhead and retain sufficient derivatization space for subsequent optimization. Combined with the modular strategy of SuFEx click chemistry, it enables versatile modification of compounds and functionalization of complex molecules, improves the efficiency of structural optimization and rapidly expands druggability, making it suitable for high-throughput probe and custom covalent library construction. It provides an efficient research tool for the development of broad-spectrum covalent inhibitors targeting Lys/Tyr/Ser/His, covalent PROTACs for E3 ligases and chemical biology probe development, meeting the requirements of modern drug research for high throughput, high success rate and high derivatization potential.

This library contains 1,162 sulfonyl fluoride fragments with high structural diversity, favorable drug-like properties and tunable electrophilicity. It is well suited for precise targeting of non-Cys residues and meets the criteria of simple structure and high derivatization potential. It effectively improves

Cat. No.	Product Name	Type

HY-D3049

5(6)-carbonylated rhodamine 110 NHS ester	Fluorescent Dyes
5(6)-carbonylated rhodamine 110 NHS ester is a reactive ester fluorescent reagent based on 5(6)-carbonylated rhodamine 110. NHS ester is a highly reactive ester capable of covalently coupling with primary amine groups in molecules such as proteins, peptides, amino sugars, and nucleic acids to form stable amide bonds (Ex/Em = 502/527 nm).

HY-D3050

5(6)-carbonylated rhodamine 110 X NHS ester	Fluorescent Dyes
5(6)-carbonylated rhodamine 110 X NHS ester is a reactive ester fluorescent reagent based on 5(6)-carbonylated rhodamine 110 X. NHS ester is a highly reactive ester capable of covalently coupling with primary amine groups in molecules such as proteins, peptides, amino sugars, and nucleic acids to form stable amide bonds (Ex/Em = 496/522 nm).

HY-D3053

5(6)-Rhodamine 6G NHS ester	Fluorescent Dyes
5(6)-Rhodamine 6G NHS ester is a reactive ester fluorescent reagent based on Rhodamine 6G (HY-D0309). NHS ester is a highly reactive ester capable of covalently coupling with primary amine groups in molecules such as proteins, peptides, amino sugars, and nucleic acids to form stable amide bonds (Ex/Em = 526/547 nm).

Cat. No.	Product Name	Type

HY-W190877

Thiol-PEG1-acid SH-PEG1-COOH	Biochemical Assay Reagents
Thiol-PEG1-acid (SH-PEG1-COOH) is a PEG derivative consisting of a thiol (-SH), 1 PEG unit, and a carboxyl (-COOH). The thiol is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. The carboxyl group can easily form stable amide bonds with amino groups, and can also form ester bonds with hydroxyl groups.

HY-174949B

FMOC-NH-PEG3400-SH FMOC-NH-PEG3400-Thiol	Biochemical Assay Reagents
FMOC-NH-PEG3400-SH (FMOC-NH-PEG3400-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

FMOC-NH-PEG3400-SH

FMOC-NH-PEG3400-Thiol

Biochemical Assay Reagents

FMOC-NH-PEG3400-SH (FMOC-NH-PEG3400-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-174949C

FMOC-NH-PEG5000-SH FMOC-NH-PEG5000-Thiol	Biochemical Assay Reagents
FMOC-NH-PEG5000-SH (FMOC-NH-PEG5000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

FMOC-NH-PEG5000-SH

FMOC-NH-PEG5000-Thiol

Biochemical Assay Reagents

FMOC-NH-PEG5000-SH (FMOC-NH-PEG5000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-174949D

FMOC-NH-PEG10000-SH FMOC-NH-PEG10000-Thiol	Biochemical Assay Reagents
FMOC-NH-PEG10000-SH (FMOC-NH-PEG10000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

FMOC-NH-PEG10000-SH

FMOC-NH-PEG10000-Thiol

Biochemical Assay Reagents

FMOC-NH-PEG10000-SH (FMOC-NH-PEG10000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-174949

FMOC-NH-PEG1000-SH FMOC-NH-PEG1000-Thiol	Biochemical Assay Reagents
FMOC-NH-PEG1000-SH (FMOC-NH-PEG1000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

FMOC-NH-PEG1000-SH

FMOC-NH-PEG1000-Thiol

Biochemical Assay Reagents

FMOC-NH-PEG1000-SH (FMOC-NH-PEG1000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-174949A

FMOC-NH-PEG2000-SH FMOC-NH-PEG2000-Thiol	Biochemical Assay Reagents
FMOC-NH-PEG2000-SH (FMOC-NH-PEG2000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

FMOC-NH-PEG2000-SH

FMOC-NH-PEG2000-Thiol

Biochemical Assay Reagents

FMOC-NH-PEG2000-SH (FMOC-NH-PEG2000-Thiol) is a PEG derivative with an Fmoc protecting group and a thiol (-SH) reactive group. The thiol group is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds. Fmoc is a commonly used amino protecting group that protects the amino group from unwanted reactions until it is removed when a specific coupling reaction is required.

HY-29501

Thiol-PEG2-NH2 SH-PEG2-NH2	Biochemical Assay Reagents
Thiol-PEG2-NH2 (SH-PEG2-NH2) is a PEG derivative consisting of a thiol (-SH), 2 PEG units, and NH2. Thiol is a highly reactive chemical group that can react specifically with a variety of molecules to form stable covalent bonds.

MCE Japan Authorized Agent ナミキ商事株式会社コスモ・バイオ株式会社重松貿易株式会社
Salutation			Country or Region *
Applicant Name *			Organization Name *
Department *
Email Address *			Product Name *
Cat. No.			Requested quantity *
Phone Number *
Remarks

Inhibitors & Agonists

Screening Libraries

Fluorescent Dyes

Biochemical Assay Reagents

Name
Email *

	Sorry, but the email address you supplied was invalid.