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Results for "

Quorum Sensing

" in MedChemExpress (MCE) Product Catalog:

By Targets:	11β-HSD (1) ADC Payload (1) AMPK (1) Amyloid-β (5) Antibiotic (7) Apoptosis (2) Bacterial (103) Biochemical Assay Reagents (6) Caspase (1) COX (1) DNA/RNA Synthesis (1) Drug Intermediate (2) Drug Isomer (1) Drug Metabolite (3) Elastase (3) Endogenous Metabolite (11) Environmental Pollutants (1) ERK (2) Estrogen Receptor/ERR (1) Fungal (13) HCV (1) Heme Oxygenase (HO) (1) HIV Integrase (1) Isotope-Labeled Compounds (3) JNK (1) Keap1-Nrf2 (1) Melanocortin Receptor (1) Mitochondrial Metabolism (4) NF-κB (1) NO Synthase (1) Parasite (3) Proteasome (5) Reactive Oxygen Species (ROS) (10) Reference Standards (13) SOD (1) STAT (1) TGF-beta/Smad (1) TrxR (1)
By Research Areas:	Cancer (12) Endocrinology (5) Infection (104) Inflammation/Immunology (9) Metabolic Disease (11) Neurological Disease (8)

By Targets:

11β-HSD (1)

ADC Payload (1)

AMPK (1)

Amyloid-β (5)

Antibiotic (7)

Apoptosis (2)

Bacterial (103)

Biochemical Assay Reagents (6)

Caspase (1)

COX (1)

DNA/RNA Synthesis (1)

Drug Intermediate (2)

Drug Isomer (1)

Drug Metabolite (3)

Elastase (3)

Endogenous Metabolite (11)

Environmental Pollutants (1)

ERK (2)

Estrogen Receptor/ERR (1)

Fungal (13)

HCV (1)

Heme Oxygenase (HO) (1)

HIV Integrase (1)

Isotope-Labeled Compounds (3)

JNK (1)

Keap1-Nrf2 (1)

Melanocortin Receptor (1)

Mitochondrial Metabolism (4)

NF-κB (1)

NO Synthase (1)

Parasite (3)

Proteasome (5)

Reactive Oxygen Species (ROS) (10)

Reference Standards (13)

SOD (1)

STAT (1)

TGF-beta/Smad (1)

TrxR (1)

By Research Areas:

Cancer (12)

Endocrinology (5)

Infection (104)

Inflammation/Immunology (9)

Metabolic Disease (11)

Neurological Disease (8)

127

Inhibitors & Agonists

Biochemical Assay Reagents

Peptides

Natural
Products

Isotope-Labeled Compounds

Targets Recommended: CaSR

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-114544A

N-3-oxo-dodecanoyl-L-homoserine lactone 2 Publications Verification OdDHL	Bacterial NF-κB ERK Caspase Reactive Oxygen Species (ROS) Apoptosis	Metabolic Disease Inflammation/Immunology Cancer
N-3-oxo-dodecanoyl-L-Homoserine lactone (3-oxo-C12-HSL) is a bacterial quorum-sensing signaling molecule produced by *P. aeruginosa* and strains of the *B. cepacia* complex ^[2].Quorum sensing is a regulatory system used by bacteria for controlling gene expression in response to increasing cell density.N-3-oxo-dodecanoyl-L-Homoserine lactone induces the production of IL-8 in 16HBE human bronchial epithelial cells .

HY-P1940

Maculosin Cyclo(Tyr-Pro)	Endogenous Metabolite Bacterial Fungal	Infection Cancer
Maculosin (Cyclo (Tyr-Pro)) is a host-specific phytotoxin for spotted knapweed from Alternaria alternata. Maculosin is a quorum-sensing molecule involved in cell-cell communication. Maculosin also acts as a signaling molecule regulating virulence gene expression. Maculosin shows antimicrobial, antifungal, antioxidant and anti-cancer properties .Maculosin (Cyclo (Tyr-Pro)) is a host-specific phytotoxin for spotted knapweed from Alternaria alternata. Maculosin is a quorum-sensing molecule involved in cell-cell communication. Maculosin also acts as a signaling molecule regulating virulence gene expression. Maculosin shows antimicrobial, antifungal, antioxidant and anti-cancer properties .

HY-133685

N-Hexanoyl-L-homoserine lactone C6-HSL	Bacterial	Infection Metabolic Disease
N-Hexanoyl-L-homoserine lactone is a short-chained N-acyl homoserine lactone (AHL). N-hexanoyl-L-homoserine lactone is also a mediator of bacterial quorum-sensing regulation. N-hexanoyl-L-homoserine lactone promotes lipid accumulation in algae. AHL is an intercellular communication signal molecule in the quorum sensing system of Gram-negative bacteria and a medium for mediating information exchange between eukaryotic plants and prokaryotic bacteria. AHL can affect bacteria activities, such as biofilm formation, pigment synthesis, and antibiotic synthesis .

HY-N4117

Hamamelitannin	Bacterial	Infection
Hamamelitannin, a polyphenol extracted from the bark of Hamamelis virginiana, is a quorum-sensing (QS) inhibitor. Hamamelitannin increases antibiotic susceptibility of staphylococcus aureus biofilms by affecting peptidoglycan biosynthesis and eDNA release .

HY-111278

Pyocyanin 2 Publications Verification Pyocyanine; Sanazin; Sanasin	Reactive Oxygen Species (ROS) Bacterial Drug Metabolite Endogenous Metabolite	Infection Inflammation/Immunology
Pyocyanin (Pyocyanine) is a toxic, quorum sensing (QS) controlled metabolite produced by Pseudomonas aeruginosa. Pyocyanin is a REDOX active compound that promotes the production of reactive oxygen species (ROS). Pyocyanin has antibacterial and anti-inflammatory activity .

HY-W008806

N-(3-Oxohexanoyl)-L-homoserine lactone OHHL; N-(3-Oxohexanoyl)homoserine lactone	Bacterial	Infection Inflammation/Immunology
N-(3-Oxohexanoyl)-L-homoserine lactone (OHHL; N-(3-Oxohexanoyl)homoserine lactone) is a specific agonist of LuxR-type transcription factor CarR with a K_d of 1.8 μM. N-(3-Oxohexanoyl)-L-homoserine lactone activates CarR by inducing protein multimerization, promoting its binding to target DNA sequences in the carR-carA intergenic region, thereby upregulating the transcription of carbapenem biosynthesis genes. N-(3-Oxohexanoyl)-L-homoserine lactone acts as a quorum sensing signal molecule, enabling bacteria to coordinate the production of carbapenem antibiotics in a cell density-dependent manner. N-(3-Oxohexanoyl)-L-homoserine lactone is used to study bacterial quorum sensing mechanisms, especially the secondary metabolism and virulence factor regulatory pathways of Erwinia carotovora and Yersinia enterocolitica .

HY-128200

Pseudomonas quinolone signal 2 Publications Verification PQS	Bacterial	Infection Inflammation/Immunology
Pseudomonas quinolone signal (PQS) is a quorum-sensing signaling molecule produced by Pseudomonas aeruginosa. The synthesis of Pseudomonas quinolone signal relies on the las quorum-sensing system, and its biological activity is associated with the rhl system. Pseudomonas quinolone signal regulates the expression of the virulence gene lasB. Additionally, Pseudomonas quinolone signal plays roles in iron acquisition, cytotoxicity, outer-membrane vesicle biogenesis, and host immune modulation .

HY-118697

N-dodecanoyl-L-Homoserine lactone 1 Publications Verification C12-HSL	Bacterial	Infection
N-dodecanoyl-L-Homoserine lactone (C12-HSL) is a quorum sensing (QS) signaling molecule. N-dodecanoyl-L-Homoserine lactone (C12-HSL) aptamers blocks qurom sensing and inhibits biofilm formation in Pseudomonas aeruginosa .

HY-P10486

AIP-II	Bacterial	Infection
AIP-II is a cyclic peptide signaling molecule for quorum sensing, which is produced by Staphylococcus aureus. AIP-II potently inhibits AgrC-III in Methicillin (HY-121544)-resistant type III Staphylococcus aureus strain AH1747, with an IC50 of 0.532 nM. AIP-II binds to the AgrC-II receptor and regulates virulence gene expression in Staphylococcus aureus .

HY-W008270

2(5H)-Furanone γ-Crotonolactone	Endogenous Metabolite Bacterial	Infection Neurological Disease
2(5H)-Furanone (γ-Crotonolactone) is an endogenous metabolite. 2(5H)-Furanone mimics N-acyl homoserine lactone signals, occupies the binding site of LuxR homologs, and interferes with quorum sensing-mediated gene regulation. 2(5H)-Furanone inhibits quorum sensing mediated by AHLs with different acyl chain lengths. 2(5H)-Furanone inhibits biofilm formation of environmental Aeromonas hydrophila strains on polystyrene plates. 2(5H)-Furanone suppresses spike-and-wave discharges in a rat model of generalized absence seizures and exhibits selective activity against absence seizures. 2(5H)-Furanone can be used in studies related to bacteria infections and generalized absence seizures.

HY-131011

Furanone C-30 1 Publications Verification	Bacterial	Infection
Furanone C-30 is a quorum sensing inhibitor. Furanone C-30 can effectively inhibit bacterial biofilm formation by S. mutans and its luxSmutant strain .

HY-W045071

N-Hexanoyl-DL-homoserine lactone	Bacterial	Infection
N-Hexanoyl-DL-homoserine lactone is a bacterial quorum sensing molecule produced in the rhizosphere. N-Hexanoyl-DL-homoserine lactone, a bacterial quorum sensing signal, induces transcriptional changes in Arabidopsis and may contribute to tuning plant growth to the microbial composition of the rhizosphere .

HY-P2522

Competence-Stimulating Peptide-2 (CSP-2)	Bacterial	Infection
Competence-Stimulating Peptide-2 (CSP-2) is a 17-amino acid signal peptide produced by Streptococcus pneumoniae, with an EC₅₀ of 50.7 nM for its compatible receptor ComD2. Competence-Stimulating Peptide-2 (CSP-2) can regulate bacterial phenotypes such as competence development, virulence, and biofilm formation through quorum sensing .

HY-108700

N-3-Oxo-octanoyl-L-homoserine lactone	SOD	Infection
N-3-Oxo-octanoyl-L-homoserine lactone, a quorum-sensing signal, is an Agrobacterium autoinducer .

HY-119808

Terrein	Melanocortin Receptor Apoptosis Antibiotic	Cancer
Terrein is a melanogenesis inhibitor . Terrein induces apoptosis in breast cancer cell lines . Terrein is an inhibitor of quorum sensing and c-di-GMP in Pseudomonas aeruginosa .

HY-Y0248

(E,E)-Farnesol trans,trans-Farnesol; (2E,6E)-Farnesol	Fungal	Infection
(E,E)-Farnesol (trans,trans-Farnesol) is a quorum-sensing molecule of Candida species. (E,E)-Farnesol can inhibit the growth, metabolism and biofilm formation of various Candida species, and affect their morphology and invasiveness .

HY-W010608

2-Methyltetrahydrofuran-3-one	Bacterial	Infection
2-Methyltetrahydrofuran-3-one is a quorum sensing inhibitor that can inhibit biofilm formation by H. alvei. 2-Methyltetrahydrofuran-3-one is one of the volatile constituents of roasted coffee .

HY-W104758

Elastase-IN-3	Elastase Antibiotic Bacterial	Others
Elastase-IN-3 (Compound 2i) is an Elastase inhibitor of Pseudomonas aeruginosa. Elastase-IN-3 inhibits the quorum sensing system of Pseudomonas aeruginosa by targeting the LasR protein (K_D value of 7.04 M), thereby preventing food spoilage caused by Pseudomonas aeruginosa .

HY-120504

N-Acetyltyramine 1 Publications Verification	Bacterial	Infection Cancer
N-Acetyltyramine is a quorum-sensing inhibitor (QSI) compound produced by V. alginolyticus M3-10. N-Acetyltyramine is capable of inhibiting the QS of C. violaceum ATCC 12472. N-acetyltyramine reverses resistance in Doxorubicin-resistant leukemia P388 cells .

HY-W012572

D-Histidine	Mitochondrial Metabolism Bacterial	Infection Metabolic Disease
D-Histidine is an anti-biofilm agent that targets bacterial quorum sensing systems (such as RhlI/RhlR pathway) and has antibacterial activity. D-Histidine works by non-covalently binding to bacterial regulatory factors or copper ion complexes, selectively inhibiting bacterial biofilm formation and motility. D-Histidine downregulates quorum sensing-related gene expression, reduces the synthesis of virulence factors (such as alginate and proteases), and interferes with bacterial membrane stability, inhibiting biofilm formation, promoting the disintegration of mature biofilms, and enhancing antibiotic sensitivity. D-Histidine is also an efficient catalyst for the salt-induced peptide formation (SIPF) reaction, which promotes the condensation of amino acids to form dipeptides (such as dialanine and dilysine) by forming a complex with copper ions (Cu ²⁺) .

HY-129405

N-(Ketocaproyl)-DL-homoserine lactone	Bacterial	Infection
N-(Ketocaproyl)-DL-homoserine lactone is a natural, very active ligand of LuxR. N-(Ketocaproyl)-DL-homoserine lactone is a quorum sensing (QS) autoinducer .

HY-P11175

Competence-stimulating peptide	Bacterial	Infection
Competence-stimulating peptide is a competence-stimulating peptide. Competence-stimulating peptide activates the Com-dependent quorum sensing system of S. mutans. Competence-stimulating peptide restores bacteriocin production .

HY-P2454

CSP1 1 Publications Verification	Bacterial	Infection
CSP1 is a potent and selective ComD1 receptor agonist, with an IC₅₀ of 10.3 nM. CSP1 is a major variants of competence-stimulating peptide (CSP), and it can regulate genetic transformation of S. pneumonia by modulating quorum sensing (QS). CSP1 can act as an antibacterial agent .

HY-W342499

3-Hydroxy myristic acid methyl ester Methyl 3-hydroxytetradecanoate; 3-OH PAME; Methyl 3-hydroxymyristate	Fungal	Metabolic Disease
3-Hydroxy myristic acid methyl ester (Methyl 3-hydroxytetradecanoate) is the quorum-sensing signal molecule (quormone), which regulates the virulence of Ralstonia solanacearum .

HY-N2795

9-Hydroxycalabaxanthone Xanthone I	Parasite Bacterial	Infection
9-Hydroxycalabaxanthone (Xanthone I) is a known xanthone isolated from Garcinia mangostana Linn. 9-Hydroxycalabaxanthone has quorum-sensing inhibitory, anti-microbial, and anti-malarial activities (IC₅₀=1.2-1.5 μM) .

HY-124796

Qstatin	Bacterial	Infection
QStatin is a potent and selective inhibitor of SmcR (V. harveyi LuxR homologue) with an EC₅₀ of 208.9 nM, binding tightly to SmcR and changes the flexibility of the protein, thereby altering its transcription regulatory activity. QStatin shows pan-QS (Vibrio quorum sensing) inhibitor activity in diverse Vibrio species and attenuates their virulence in an aquatic host. QStatin may be a sustainable antivibriosis agent useful in aquacultures .

HY-158730

N-3-Hydroxybutyryl-L-homoserine lactone 3-OH-C4-HSL; N-3-Hydroxybutanoyl-L-homoserine lactone; N-3-Hydroxybutyryl-L-HSL	Bacterial	Infection
N-3-Hydroxybutyryl-L-homoserine lactone (3-OH-C4-HSL) is an acyl-homoserine lactone, that can be isolated from Vibrionaceae. N-3-Hydroxybutyryl-L-homoserine lactone is a signaling molecule that is involved in bacterial quorum sensing (QS). N-3-Hydroxybutyryl-L-homoserine lactone senses the density of bacterial population, regulates the cellular process, such as bioluminescence, biofilm formation, and exo-enzyme production .

HY-133683

N-(3-Oxotetradecanoyl)-DL-homoserine lactone 3-Oxo-C14-AHL	Bacterial	Metabolic Disease
N-(3-Oxotetradecanoyl)-DL-homoserine lactone, a member of N-Acyl homoserine lactone (AHL) from gram-negative bacteria, is a quorum sensing (QS) signaling molecule .

HY-134560

N-(3-Oxodecanoyl)-L-homoserine lactone 3-Oxo-C10-HSL	Bacterial	Inflammation/Immunology
N-(3-Oxodecanoyl)-L-homoserine lactone (3-Oxo-C10-HSL) is a bacterial quorum sensing signal autoinducer molecule .

HY-W015800

L-Homoserine lactone hydrochloride	Drug Intermediate	Others
L-Homoserine lactone hydrochloride is the core structural unit of the bacterial quorum-sensing signal molecule N-acyl-L-homoserine lactone (AHLs). As an important intermediate, L-Homoserine lactone hydrochloride acylated derivatives have potent immunosuppressive activity .

HY-126858

Ambuic acid (+)-Ambuic acid	ERK JNK NO Synthase COX	Infection Inflammation/Immunology
Ambuic acid exhibits antimicrobial activity against Staphylococcus aureus, with IC₅₀ of 43.9 μM for strain ATCC 6538. Ambuic acid is an inhbitor for the biosynthesis of cyclic peptide quorum sensing molecules (quormones) in gram-positive bacteria. Ambuic acid exhibits anti-inflammatory activity through ERK/JNK/MAPK signaling pathway .

HY-W015818

2-Benzoxazolinone 1 Publications Verification 2-Benzoxazolone; 1,3-Benzoxazol-2(3H)-one; 2-Hydroxybenzoxazole	Parasite	Infection
2-Benzoxazolinone is an anti-leishmanial agent with an LC₅₀ of 40 μg/mL against L. donovani . A building block in chemical synthesis. 1,3-Benzoxazol-2(3H)-one derivatives have antimicrobial activity against a selection of Gram-positive, Gram-negative bacteria and yeasts . Derivatives as anti-quorum sensing agent .

HY-P2145

Extracellular death factor EDF	Bacterial	Infection
Extracellular death factor (EDF) is the only single signaling molecule involved in Escherichia coli **quorum sensing**, and can initiate MAZEF-mediated cell death. Extracellular death factor significantly amplifies the endoribonucleolytic activities of both MazF and ChpBK .

HY-117005

C450-0730	Bacterial	Infection
C450-0730 is an antagonist targeting the AHL membrane-bound sensor kinase and is an antagonist of the nine-transmembrane protein LuxN of Vibrio harveyi . C450-0730 competitively binds to the LuxN AI-1 binding site and specifically antagonizes the LuxN/AI-1 quorum sensing signal in Vibrio harveyi. The inhibitory activity of C450-0730 against LuxN ^I209F was not significant .

HY-134215

cis-11-Methyl-2-dodecenoic acid	Bacterial Fungal	Infection
cis-11-Methyl-2-dodecenoic acid is a quorum sensing (QS) signal that acts as a diffusion signaling factor (DSF) in extracellular microbial and fungal communication systems. DSF is involved in the regulation of virulence and biofilm formation of a variety of bacterial pathogens .

HY-163838

Quorum sensing-IN-6	Bacterial	Infection
Quorum sensing-IN-6 (compound 27) is a quorum sensing (QS) inhibitor with IC₅₀ values of 8 and 106 nM for E.coli and Pyocyanin, respectively .

HY-D0272

2,3,4-Trihydroxybenzophenone	Estrogen Receptor/ERR	Metabolic Disease
2,3,4-Trihydroxybenzophenone is a hydroxylated benzophenone UV filter with estrogenic activity. 2,3,4-Trihydroxybenzophenone is a quorum sensing inhibitor and an EC 1.14.18.1 (tyrosinase) inhibitor. 2,3,4-Trihydroxybenzophenone is also a human urinary metabolite, a rat metabolite and a drug metabolite .

HY-Y0248AS

(E,E)-Farnesol-d6 trans,trans-Farnesol-d₆; (2E,6E)-Farnesol-d₆	Isotope-Labeled Compounds Fungal	Infection
(E,E)-Farnesol-d₆ (trans,trans-Farnesol-d₆) is deuterium labeled (E,E)-Farnesol (HY-Y0248). (E,E)-Farnesol (trans,trans-Farnesol) is a quorum-sensing molecule of Candida species. (E,E)-Farnesol can inhibit the growth, metabolism and biofilm formation of various Candida species, and affect their morphology and invasiveness .

HY-141641

N-(3-Oxopentanoyl)-L-homoserine lactone HSL	Bacterial	Infection
N-(3-Oxopentanoyl)-L-homoserine lactone is an autoinducer, a kind of chemical signal molecule which passively diffuses across the bacterial envelope and accumulates intracellularly at high bacterial densities. It may bind to a protein related to the LuxR protein of V. fischeri and causes cell density-dependent gene expression. N-(3-Oxopentanoyl)-L-homoserine can be used for research of quorum sensing .

HY-149479

Quorum sensing-IN-3	Bacterial	Infection
Quorum sensing-IN-3 (Compound 3a) is a quorum sensing inhibitor against pseudomonas aeruginosa. Quorum sensing-IN-3 inhibits biofilm formation .

HY-W007390

Methyl 2-amino-5-bromobenzoate 1 Publications Verification	Bacterial Drug Intermediate	Infection
Methyl 2-amino-5-bromobenzoate (Compound 8/12) is a biochemical reagent. Methyl 2-amino-5-bromobenzoate can be used to synthesize 2-benzamidobenzoic acid, a known FabH inhibitor. Derivatives of methyl 2-amino-5-bromobenzoate also inhibit PqsD, the pqs quorum sensing (QS) system, of Pseudomonas aeruginosa .

HY-N12660

Quorum sensing-IN-4	Bacterial	Infection
Quorum sensing-IN-4 (compound 2) is a quorum sensing inhibitor, and can be isolated from Thailand mangrove-derived Streptomyces strain, OUCMDZ-5511 .

HY-159170

Quorum sensing-IN-7	Bacterial	Infection
Quorum sensing-IN-7 (compound HSL 4) is a potent quorum sensing (QS) inhibitor. Quorum sensing-IN-7 interacts with Leu 72 and Gln 95 in the CviR binding pocket. Quorum sensing-IN-7, an antibacterial agent, is highly effective at inhibiting the production of homoserine lactones (HSLs) and biofilm in C. violaceum at 0.25-1 mg/mL .

HY-172895

Quorum sensing-IN-10	Bacterial	Infection Inflammation/Immunology
Quorum sensing-IN-10 (10p), an antibacterial synergist, shows significant inhibition of P. aeruginosa virulence, biofilm, and motility, with low toxicity. Quorum sensing-IN-10 (10p) can be used in the research for drug-resistant Pseudomonas aeruginosa infections .

HY-133685R

N-Hexanoyl-L-homoserine lactone (Standard) C6-HSL (Standard)	Reference Standards Bacterial	Infection Metabolic Disease
N-Hexanoyl-L-homoserine lactone (Standard) is the analytical standard of N-Hexanoyl-L-homoserine lactone (HY-133685). This product is intended for research and analytical applications. N-Hexanoyl-L-homoserine lactone is a short-chained N-acyl homoserine lactone (AHL). N-hexanoyl-L-homoserine lactone is also a mediator of bacterial quorum-sensing regulation. N-hexanoyl-L-homoserine lactone promotes lipid accumulation in algae. AHL is an intercellular communication signal molecule in the quorum sensing system of Gram-negative bacteria and a medium for mediating information exchange between eukaryotic plants and prokaryotic bacteria. AHL can affect bacteria activities, such as biofilm formation, pigment synthesis, and antibiotic synthesis.

HY-118697R

N-Dodecanoyl-L-homoserine lactone (Standard) C12-HSL (Standard)	Reference Standards Bacterial	Infection
N-dodecanoyl-L-Homoserine lactone (Standard) (C12-HSL (Standard)) is the analytical standard of N-dodecanoyl-L-Homoserine lactone (HY-118697). This product is intended for research and analytical applications. N-dodecanoyl-L-Homoserine lactone (C12-HSL) is a quorum sensing (QS) signaling molecule. N-dodecanoyl-L-Homoserine lactone (C12-HSL) aptamers blocks qurom sensing and inhibits biofilm formation in Pseudomonas aeruginosa.

HY-W012572A

D-Histidine hydrochloride hydrate	Mitochondrial Metabolism Bacterial	Infection Metabolic Disease
D-Histidine hydrochloride hydrate is an anti-biofilm agent that targets bacterial quorum sensing systems (such as RhlI/RhlR pathway) and has antibacterial activity. D-Histidine hydrochloride hydrate works by non-covalently binding to bacterial regulatory factors or copper ion complexes, selectively inhibiting bacterial biofilm formation and motility. D-Histidine hydrochloride hydrate downregulates quorum sensing-related gene expression, reduces the synthesis of virulence factors (such as alginate and proteases), and interferes with bacterial membrane stability, inhibiting biofilm formation, promoting the disintegration of mature biofilms, and enhancing antibiotic sensitivity. D-Histidine hydrochloride hydrate is also an efficient catalyst for the salt-induced peptide formation (SIPF) reaction, which promotes the condensation of amino acids to form dipeptides (such as dialanine and dilysine) by forming a complex with copper ions (Cu ²⁺) .

HY-124237AR

N-Octanoyl-L-homoserine lactone (Standard) C8-HSL (Standard)	Reference Standards Bacterial	Infection
N-Octanoyl-L-homoserine lactone (Standard) is the analytical standard of N-Octanoyl-L-homoserine lactone (HY-124237A). This product is intended for research and analytical applications. N-octanoyl-L-Homoserine lactone is a small diffusible signaling molecule involved in quorum sensing, thereby controlling gene expression and affecting cellular metabolism. N-octanoyl-L-Homoserine lactone can be used for the infection prevention and regulation of virulence in cystic fibrosis.

HY-139902

Quorum sensing-IN-1	Others	Others
Quorum sensing-IN-1 is a small-molecule quorum sensing inhibitor.

HY-168948

Quorum sensing-IN-9	Bacterial	Infection
Quorum sensing-IN-9 (Compound 7d) inhibits **quorum sensing** in Pseudomonas aeruginosa by binding PqsR proteins. Quorum sensing-IN-9 inhibits the expression of quorum sensing systems related genes lasB, rhlA and pqsA, blocks the generation of virulence factors elastase, pyocyanin and rhamnolipid. Quorum sensing-IN-9 destorys the motility of P. aeruginosa, inhibits the biofilm formation, decreasing the virulence and pathogenicity of P. aeruginosa. Quorum sensing-IN-9 exhibits anti-infectious activity in Galleria mellonella larval model .

Cat. No.	Product Name	Type

HY-Y0248

(E,E)-Farnesol trans,trans-Farnesol; (2E,6E)-Farnesol	Biochemical Assay Reagents
(E,E)-Farnesol (trans,trans-Farnesol) is a quorum-sensing molecule of Candida species. (E,E)-Farnesol can inhibit the growth, metabolism and biofilm formation of various Candida species, and affect their morphology and invasiveness .

HY-W127393

N-Nonanoyl-L-homoserine lactone

Biochemical Assay Reagents

Quorum sensing is a regulatory system used by bacteria to control gene expression in response to increased cell density. This regulatory process manifests itself in a variety of phenotypes, including biofilm formation and virulence factor production. Coordinated gene expression is achieved through the production, release and detection of small diffusible signaling molecules called autoinducers. N-acylated homoserine lactones (AHLs) comprise a class of such autoinducers, each of which generally consists of a fatty acid coupled to a homoserine lactone (HSL). Modulation of bacterial quorum-sensing signaling systems to suppress pathogenesis represents a new approach to antimicrobial research for infectious diseases. AHLs differ in acyl length (C4-C18), C3 substitution (hydrogen, hydroxyl, or oxo group), and the presence or absence of one or more carbon-carbon double bonds in the fatty acid chain. These differences confer signaling specificity through the affinity of the LuxR family of transcriptional regulators. C9-HSL is a rare odd-numbered acyl carbon chain produced by wild-type Erwinia carotovora strain SCC 3193 grown in nutrient-rich Luria-Bertani broth (LB) medium.

HY-116762

N-butyryl-L-Homocysteine thiolactone

Biochemical Assay Reagents

Quorum sensing is a regulatory system used by bacteria to control gene expression in response to increased cell density. The control of bacterial infection by quenching the quorum sensing system of bacteria is a promising research area. The expression of specific target genes, such as transcriptional regulators belonging to the LuxIR protein family, is coordinated by the synthesis of diffusible acyl homoserine lactone (AHL) molecules. N-butyryl-L-Homocysteine thio-lactone is an analog of N-butyryl-L-homoserine lactone, a small, diffusible signaling molecule involved in quorum sensing, thereby controlling gene expression and cellular metabolism . N-butyryl-L-homocysteine thiolactone induces violacein expression in Viola viola mutants that normally fail to produce AHL.

HY-114773

N-Undecanoyl-L-homoserine lactone

Biochemical Assay Reagents

Quorum sensing is a regulatory system used by bacteria to control gene expression in response to increased cell density. This regulatory process manifests itself in a variety of phenotypes, including biofilm formation and virulence factor production. Coordinated gene expression is achieved through the production, release and detection of small diffusible signaling molecules called autoinducers. N-acylated homoserine lactones (AHLs) comprise a class of such autoinducers, each of which generally consists of a fatty acid coupled to a homoserine lactone (HSL). Modulation of bacterial quorum-sensing signaling systems to suppress pathogenesis represents a new approach to antimicrobial research for infectious diseases. AHLs differ in acyl length (C4-C18), C3 substitution (hydrogen, hydroxyl, or oxo group), and the presence or absence of one or more carbon-carbon double bonds in the fatty acid chain. These differences confer signaling specificity through the affinity of the LuxR family of transcriptional regulators. C11-HSL has a rare odd-numbered acyl carbon chain and may be a minor quorum-sensing signaling molecule in Pseudomonas aeruginosa strains.

HY-Y0248R

(E,E)-Farnesol (Standard)

trans,trans-Farnesol (Standard); (2E,6E)-Farnesol (Standard)

Biochemical Assay Reagents

(E,E)-Farnesol (Standard) (trans,trans-Farnesol (Standard)) is the analytical standard of (E,E)-Farnesol (HY-Y0248). This product is intended for research and analytical applications. (E,E)-Farnesol (trans,trans-Farnesol) is a quorum-sensing molecule of Candida species. (E,E)-Farnesol can inhibit the growth, metabolism and biofilm formation of various Candida species, and affect their morphology and invasiveness .

HY-W127487

N-Octadecanoyl-L-homoserine lactone

Biochemical Assay Reagents

Quorum sensing is a regulatory system used by bacteria to control gene expression in response to increased cell density. This regulatory process manifests itself in a variety of phenotypes, including biofilm formation and virulence factor production. Coordinated gene expression is achieved through the production, release and detection of small diffusible signaling molecules called autoinducers. N-acylated homoserine lactones (AHLs) comprise a class of such autoinducers, each of which generally consists of a fatty acid coupled to a homoserine lactone (HSL). Modulation of bacterial quorum-sensing signaling systems to suppress pathogenesis represents a new approach to antimicrobial research for infectious diseases. AHLs differ in acyl length (C4-C18), C3 substitution (hydrogen, hydroxyl, or oxo group), and the presence or absence of one or more carbon-carbon double bonds in the fatty acid chain. These differences confer signaling specificity through the affinity of the LuxR family of transcriptional regulators. C18-HSL, one of four lipophilic long acyl side chain AHLs produced by the LuxI AHL synthase homolog SinI, is involved in quorum-sensing signaling in strains of Rhizobium meliloti (a nitrogen-fixing bacterial symbiont of the legume M. sativa) . C18-HSL and other hydrophobic AHLs tend to localize in the relatively lipophilic environment of bacterial cells and cannot diffuse freely across the cell membrane. Long-chain N-acyl homoserine lactones can be exported from cells by efflux pumps, or can be transported between communicating cells by extracellular outer membrane vesicles.

Cat. No.	Product Name	Target	Research Area

HY-P1940

Maculosin Cyclo(Tyr-Pro)	Endogenous Metabolite Bacterial Fungal	Infection Cancer
Maculosin (Cyclo (Tyr-Pro)) is a host-specific phytotoxin for spotted knapweed from Alternaria alternata. Maculosin is a quorum-sensing molecule involved in cell-cell communication. Maculosin also acts as a signaling molecule regulating virulence gene expression. Maculosin shows antimicrobial, antifungal, antioxidant and anti-cancer properties .Maculosin (Cyclo (Tyr-Pro)) is a host-specific phytotoxin for spotted knapweed from Alternaria alternata. Maculosin is a quorum-sensing molecule involved in cell-cell communication. Maculosin also acts as a signaling molecule regulating virulence gene expression. Maculosin shows antimicrobial, antifungal, antioxidant and anti-cancer properties .

HY-P1934

Cyclo(Phe-Pro) 5+ Cited Publications Cyclo(phenylalanylprolyl); A-64863	HCV Bacterial Antibiotic Reactive Oxygen Species (ROS)	Infection
Cyclo(Phe-Pro) (Cyclo(phenylalanylprolyl)) is a quorum-sensing molecule of Vibrio vulnificus that specifically interacts with RIG-I, inhibiting RIG-I polyubiquitination, suppressing IRF-3 activation, and reducing type I interferon production. Cyclo(Phe-Pro) enhances susceptibility to HCV and influenza virus and also alleviates plant aluminum toxicity stress. The mechanism of Cyclo(Phe-Pro) involves the regulation of host immune signaling pathways, bacterial virulence gene expression, and plant antioxidant systems, making it a promising candidate for research in viral infections, bacterial virulence regulation, and agricultural stress resistance .

HY-P10486

AIP-II	Bacterial	Infection
AIP-II is a cyclic peptide signaling molecule for quorum sensing, which is produced by Staphylococcus aureus. AIP-II potently inhibits AgrC-III in Methicillin (HY-121544)-resistant type III Staphylococcus aureus strain AH1747, with an IC50 of 0.532 nM. AIP-II binds to the AgrC-II receptor and regulates virulence gene expression in Staphylococcus aureus .

HY-P2522

Competence-Stimulating Peptide-2 (CSP-2)	Bacterial	Infection
Competence-Stimulating Peptide-2 (CSP-2) is a 17-amino acid signal peptide produced by Streptococcus pneumoniae, with an EC₅₀ of 50.7 nM for its compatible receptor ComD2. Competence-Stimulating Peptide-2 (CSP-2) can regulate bacterial phenotypes such as competence development, virulence, and biofilm formation through quorum sensing .

HY-P11175

Competence-stimulating peptide	Bacterial	Infection
Competence-stimulating peptide is a competence-stimulating peptide. Competence-stimulating peptide activates the Com-dependent quorum sensing system of S. mutans. Competence-stimulating peptide restores bacteriocin production .

HY-P2454

CSP1 1 Publications Verification	Bacterial	Infection
CSP1 is a potent and selective ComD1 receptor agonist, with an IC₅₀ of 10.3 nM. CSP1 is a major variants of competence-stimulating peptide (CSP), and it can regulate genetic transformation of S. pneumonia by modulating quorum sensing (QS). CSP1 can act as an antibacterial agent .

HY-W015800

L-Homoserine lactone hydrochloride	Drug Intermediate	Others
L-Homoserine lactone hydrochloride is the core structural unit of the bacterial quorum-sensing signal molecule N-acyl-L-homoserine lactone (AHLs). As an important intermediate, L-Homoserine lactone hydrochloride acylated derivatives have potent immunosuppressive activity .

HY-P2145

Extracellular death factor EDF	Bacterial	Infection
Extracellular death factor (EDF) is the only single signaling molecule involved in Escherichia coli **quorum sensing**, and can initiate MAZEF-mediated cell death. Extracellular death factor significantly amplifies the endoribonucleolytic activities of both MazF and ChpBK .

HY-W012572A

D-Histidine hydrochloride hydrate	Mitochondrial Metabolism Bacterial	Infection Metabolic Disease
D-Histidine hydrochloride hydrate is an anti-biofilm agent that targets bacterial quorum sensing systems (such as RhlI/RhlR pathway) and has antibacterial activity. D-Histidine hydrochloride hydrate works by non-covalently binding to bacterial regulatory factors or copper ion complexes, selectively inhibiting bacterial biofilm formation and motility. D-Histidine hydrochloride hydrate downregulates quorum sensing-related gene expression, reduces the synthesis of virulence factors (such as alginate and proteases), and interferes with bacterial membrane stability, inhibiting biofilm formation, promoting the disintegration of mature biofilms, and enhancing antibiotic sensitivity. D-Histidine hydrochloride hydrate is also an efficient catalyst for the salt-induced peptide formation (SIPF) reaction, which promotes the condensation of amino acids to form dipeptides (such as dialanine and dilysine) by forming a complex with copper ions (Cu ²⁺) .

HY-124237

N-Octanoyl-DL-homoserine lactone	Bacterial	Others
N-Octanoyl-DL-homoserine lactone is a member of N-acyl homoserine lactones (AHLs) family, also one of the signal molecule of quorum-sensing (QS) signals. N-Octanoyl-DL-homoserine lactone can regulate the production of siderophores and present positive correlation in Aeromonas sobria strain AS7. N-Octanoyl-DL-homoserine lactone can also regulate the secretion of proteases and stimulate the production of total volatile basic nitrogen (TVB-N) .

HY-P1892

Competence-Stimulating Peptide-12261	Peptides	Infection
Competence-Stimulating Peptide-12261, a sixteen peptide, is a fragment of competence-stimulating peptide. Competence-Stimulating Peptide, a quorum-sensing molecule, competence-stimulating peptide (CSP) which inhibits germ tube (GT) formation .

HY-W141788

N-Butyryl-DL-homocysteine thiolactone	Bacterial	Infection
N-Butyryl-DL-homocysteine thiolactone is an N-acyl homoserine lactone (AHL) analogue. AHLs are potent inhibitors of biofilm formation and virulence factors, and has been used for degrading microbial communities, reducing bacterial pathogenicity .

HY-P11323

XIPSve peptide	Bacterial	Infection
XIPSve peptide is a ComR_Sve receptor agonist. XIPSve peptide is promising for research of streptococcal quorum-sensing systems and antibiotic .

Cat. No.	Product Name	Category	Target	Chemical Structure

HY-P1940

Maculosin Cyclo(Tyr-Pro)	Alkaloids Monophenols Microorganisms Pyrrole Alkaloids Phenols Disease Research Fields Source Classification Cancer	Endogenous Metabolite Bacterial Fungal
Maculosin (Cyclo (Tyr-Pro)) is a host-specific phytotoxin for spotted knapweed from Alternaria alternata. Maculosin is a quorum-sensing molecule involved in cell-cell communication. Maculosin also acts as a signaling molecule regulating virulence gene expression. Maculosin shows antimicrobial, antifungal, antioxidant and anti-cancer properties .Maculosin (Cyclo (Tyr-Pro)) is a host-specific phytotoxin for spotted knapweed from Alternaria alternata. Maculosin is a quorum-sensing molecule involved in cell-cell communication. Maculosin also acts as a signaling molecule regulating virulence gene expression. Maculosin shows antimicrobial, antifungal, antioxidant and anti-cancer properties .

HY-N4117

Hamamelitannin	Infection Hamamelis mollis Oliver Classification of Application Fields Phenols Polyphenols Hamamelidaceae Plants Disease Research Fields Source Classification	Bacterial
Hamamelitannin, a polyphenol extracted from the bark of Hamamelis virginiana, is a quorum-sensing (QS) inhibitor. Hamamelitannin increases antibiotic susceptibility of staphylococcus aureus biofilms by affecting peptidoglycan biosynthesis and eDNA release .

HY-111278

Pyocyanin 2 Publications Verification Pyocyanine; Sanazin; Sanasin	Structural Classification Natural Products Microorganisms Source Classification	Reactive Oxygen Species (ROS) Bacterial Drug Metabolite Endogenous Metabolite
Pyocyanin (Pyocyanine) is a toxic, quorum sensing (QS) controlled metabolite produced by Pseudomonas aeruginosa. Pyocyanin is a REDOX active compound that promotes the production of reactive oxygen species (ROS). Pyocyanin has antibacterial and anti-inflammatory activity .

HY-114936

Piericidin A 5 Publications Verification AR-054	Infection Microorganisms Neurological Disease Classification of Application Fields Antibiotics Anti-parasitic Antibacterial Disease Research Anticancer Disease Research Fields Other Antibiotics Source Classification	Bacterial ADC Payload Antibiotic Mitochondrial Metabolism
Piericidin A (AR-054) is a natural mitochondrial NADH-ubiquinone oxidoreductase (complex I) inhibitor. Piericidin A is a potent neurotoxin and inhibits mitochondrial respiration by disrupting the electron transport system through its action on NADH-ubiquinone reductase. Piericidin A is also a potential *quorum-sensing* inhibitor that suppresses the expression of the virulence genes of Erwinia carotovora subsp. atroseptica (Eca). Piericidin A is an ADC cytotoxin and has anti-bacterial, anticancer, insecticidal activity .

HY-B0914

10-Undecenoic acid,98% (stabilized with TBC) 2 Publications Verification Undecylenic acid	Structural Classification Classification of Application Fields Ketones, Aldehydes, Acids Other Diseases Endogenous metabolite Disease Research Fields Source Classification	Environmental Pollutants Bacterial Fungal Proteasome Amyloid-β Reactive Oxygen Species (ROS)
10-Undecenoic acid (Undecylenic acid) is an antifungal agent. 10-Undecenoic acid inhibits Aβ oligomerization, scavenges ROS and inhibits μ-calpain activity. 10-Undecenoic acid has neuroprotective effects. 10-Undecenoic acid has anticancer effects on a variety of tumors. 10-Undecenoic acid inhibits C. albicans biofilm formation and MRSA infection. 10-Undecenoic acid inhibits quorum sensing signals of Bacillus subtilis and Pseudomonas aeruginosa .

HY-121362

Evernic Acid	Structural Classification other families Classification of Application Fields Ketones, Aldehydes, Acids Plants Inflammation/Immunology Disease Research Fields Source Classification	Bacterial Endogenous Metabolite TrxR
Evernic Acid is an orally active thioredoxin reductase 1 (TrxR1) inhibitor and antiproliferative agent. Evernic Acid inhibits the proliferation and migration of human breast cancer cells. Evernic Acid blocks the NF-κB pathway by inhibiting p65 nuclear translocation and IκBα phosphorylation, thereby suppressing downstream inflammatory mediators. Evernic Acid acts as an antioxidant, anti-inflammatory agent and neuroprotective agent, protects neurons from cell death, mitochondrial dysfunction and oxidative stress damage, reduces astrocyte activation, and ameliorates dopaminergic neuron loss and neuroinflammation. Evernic Acid inhibits enoyl reductases FabI and FabZ of Plasmodium falciparum. Evernic Acid downregulates the expression of lasB and rhlA genes in Pseudomonas aeruginosa, inhibits quorum sensing and biofilm formation, and exerts antibacterial activity against Gram-positive bacteria, Gram-negative bacteria and fungi. Evernic Acid is applicable to research related to breast cancer, Parkinson's disease, bacterial infections and fungal infections .

HY-W008270

2(5H)-Furanone γ-Crotonolactone	Structural Classification Natural Products Classification of Application Fields Metabolic Disease Endogenous metabolite Disease Research Fields Source Classification	Endogenous Metabolite Bacterial
2(5H)-Furanone (γ-Crotonolactone) is an endogenous metabolite. 2(5H)-Furanone mimics N-acyl homoserine lactone signals, occupies the binding site of LuxR homologs, and interferes with quorum sensing-mediated gene regulation. 2(5H)-Furanone inhibits quorum sensing mediated by AHLs with different acyl chain lengths. 2(5H)-Furanone inhibits biofilm formation of environmental Aeromonas hydrophila strains on polystyrene plates. 2(5H)-Furanone suppresses spike-and-wave discharges in a rat model of generalized absence seizures and exhibits selective activity against absence seizures. 2(5H)-Furanone can be used in studies related to bacteria infections and generalized absence seizures.

HY-107858

Veratryl alcohol 1 Publications Verification 3,4-Dimethoxybenzyl alcohol	Natural Products Microorganisms Classification of Application Fields Other Diseases Disease Research Fields	Endogenous Metabolite Bacterial
Veratryl alcohol (3,4-Dimethoxybenzyl alcohol) is a secondary metabolite of lignin-degrading fungi, commonly used as a substrate for lignin peroxidase (LiP) to measure lignin degradation activity. Veratryl alcohol protects LiP from inactivation by H₂O₂ and prevents the accumulation of LiP III compounds. Veratryl alcohol also acts as a stabilizer for manganese-dependent peroxidases (MnP). Veratryl alcohol is a quorum-sensing inhibitor (QSI) and exhibits antibacterial efficacy .

HY-B0914A

10-Undecenoic acid zinc salt 2 Publications Verification Zinc undecylenate	Infection Structural Classification Microorganisms Classification of Application Fields Ketones, Aldehydes, Acids Disease Research Fields Source Classification	Fungal Bacterial Amyloid-β Reactive Oxygen Species (ROS) Proteasome
10-Undecenoic acid zinc salt (Undecylenic acid zinc salt) is an antifungal agent. 10-Undecenoic acid zinc salt inhibits Aβ oligomerization, scavenges ROS and inhibits μ-calpain activity. 10-Undecenoic acid zinc salt has neuroprotective effects. 10-Undecenoic acid zinc salt has anticancer effects on a variety of tumors. 10-Undecenoic acid zinc salt inhibits C. albicans biofilm formation and MRSA infection. 10-Undecenoic acid zinc salt inhibits quorum sensing signals of Bacillus subtilis and Pseudomonas aeruginosa .

HY-W010608

2-Methyltetrahydrofuran-3-one	other families Classification of Application Fields Ketones, Aldehydes, Acids Other Diseases Plants Disease Research Fields Source Classification	Bacterial
2-Methyltetrahydrofuran-3-one is a quorum sensing inhibitor that can inhibit biofilm formation by H. alvei. 2-Methyltetrahydrofuran-3-one is one of the volatile constituents of roasted coffee .

HY-W012572

D-Histidine	Microorganisms Source Classification	Mitochondrial Metabolism Bacterial
D-Histidine is an anti-biofilm agent that targets bacterial quorum sensing systems (such as RhlI/RhlR pathway) and has antibacterial activity. D-Histidine works by non-covalently binding to bacterial regulatory factors or copper ion complexes, selectively inhibiting bacterial biofilm formation and motility. D-Histidine downregulates quorum sensing-related gene expression, reduces the synthesis of virulence factors (such as alginate and proteases), and interferes with bacterial membrane stability, inhibiting biofilm formation, promoting the disintegration of mature biofilms, and enhancing antibiotic sensitivity. D-Histidine is also an efficient catalyst for the salt-induced peptide formation (SIPF) reaction, which promotes the condensation of amino acids to form dipeptides (such as dialanine and dilysine) by forming a complex with copper ions (Cu ²⁺) .

HY-N6711

Equisetin	Infection Microorganisms Classification of Application Fields Antibiotics Antibacterial Disease Research Disease Research Fields Other Antibiotics Source Classification	HIV Integrase Bacterial Antibiotic Reactive Oxygen Species (ROS) STAT AMPK 11β-HSD
Equisetin is an N-methylserine-derived acyl tetramic acid, **quorum sensing inhibitor (QSI), herbicides and antibiotics. Equisetin specifically inhibits the anionic carriers of substrates in the inner mitochondrial membrane. Equisetin inhibits the activity of HIV-1 integrase, 11β-HSD1, and 2,4-dinitrophenol (Dnp)-stimulated ATPase (IC₅₀** = ~8 nmol per mg of protein). Equisetin exhibits growth inhibition of bacteria, anti-inflammatory, amelioration of lipid-associated disorders, and cytotoxic effects .

HY-133683

N-(3-Oxotetradecanoyl)-DL-homoserine lactone 3-Oxo-C14-AHL	Natural Products Microorganisms Classification of Application Fields Metabolic Disease Disease Research Fields Source Classification	Bacterial
N-(3-Oxotetradecanoyl)-DL-homoserine lactone, a member of N-Acyl homoserine lactone (AHL) from gram-negative bacteria, is a quorum sensing (QS) signaling molecule .

HY-134560

N-(3-Oxodecanoyl)-L-homoserine lactone 3-Oxo-C10-HSL	Microorganisms Ketones, Aldehydes, Acids Source Classification	Bacterial
N-(3-Oxodecanoyl)-L-homoserine lactone (3-Oxo-C10-HSL) is a bacterial quorum sensing signal autoinducer molecule .

HY-126858

Ambuic acid (+)-Ambuic acid	Microorganisms Ketones, Aldehydes, Acids Source Classification	ERK JNK NO Synthase COX
Ambuic acid exhibits antimicrobial activity against Staphylococcus aureus, with IC₅₀ of 43.9 μM for strain ATCC 6538. Ambuic acid is an inhbitor for the biosynthesis of cyclic peptide quorum sensing molecules (quormones) in gram-positive bacteria. Ambuic acid exhibits anti-inflammatory activity through ERK/JNK/MAPK signaling pathway .

HY-W015818

2-Benzoxazolinone 1 Publications Verification 2-Benzoxazolone; 1,3-Benzoxazol-2(3H)-one; 2-Hydroxybenzoxazole	Infection Alkaloids Classification of Application Fields Other Alkaloids Gramineae Secale cereale Plants Disease Research Fields Source Classification	Parasite
2-Benzoxazolinone is an anti-leishmanial agent with an LC₅₀ of 40 μg/mL against L. donovani . A building block in chemical synthesis. 1,3-Benzoxazol-2(3H)-one derivatives have antimicrobial activity against a selection of Gram-positive, Gram-negative bacteria and yeasts . Derivatives as anti-quorum sensing agent .

HY-B0914R

10-Undecenoic acid (Standard) Undecylenic acid (Standard)	Structural Classification Ketones, Aldehydes, Acids Endogenous metabolite Source Classification	Reference Standards Fungal Amyloid-β Reactive Oxygen Species (ROS) Proteasome Bacterial
10-Undecenoic acid (Standard) is the analytical standard of 10-Undecenoic acid. This product is intended for research and analytical applications. 10-Undecenoic acid (Undecylenic acid) is an antifungal agent. 10-Undecenoic acid inhibits Aβ oligomerization, scavenges ROS and inhibits μ-calpain activity. 10-Undecenoic acid has neuroprotective effects. 10-Undecenoic acid has anticancer effects on a variety of tumors. 10-Undecenoic acid inhibits C. albicans biofilm formation and MRSA infection. 10-Undecenoic acid inhibits quorum sensing signals of Bacillus subtilis and Pseudomonas aeruginosa .

HY-N8261

Amicoumacin B	Microorganisms Antibiotics Source Classification	Bacterial TGF-beta/Smad
Amicoumacin B can be produced by actinomycete, strain 04-5195 ^T.. Amicoumacin B increases the expression of bone morphogenetic protein 2 (BMP-2). Amicoumacin B has inhibitory effect against C. violaceum (MIC = 250 µg/mL). Amicoumacin B has quorum sensing inhibitory activity, and reduces the expression of the C. violaceum operons vioA, vioB, vioD, and vioE, but increases the expression of vioC .

HY-N12660

Quorum sensing-IN-4	Monophenols Microorganisms Phenols Source Classification	Bacterial
Quorum sensing-IN-4 (compound 2) is a quorum sensing inhibitor, and can be isolated from Thailand mangrove-derived Streptomyces strain, OUCMDZ-5511 .

HY-111278R

Pyocyanin (Standard) Pyocyanine (Standard); Sanazin (Standard); Sanasin (Standard)	Microorganisms Source Classification	Reference Standards Reactive Oxygen Species (ROS) Bacterial Drug Metabolite Endogenous Metabolite
Pyocyanin (Standard) is the analytical standard of Pyocyanin. This product is intended for research and analytical applications. Pyocyanin (Pyocyanine) is a toxic, quorum sensing (QS) controlled metabolite produced by Pseudomonas aeruginosa. Pyocyanin is a REDOX active compound that promotes the production of reactive oxygen species (ROS). Pyocyanin has antibacterial and anti-inflammatory activity[1][2][3][4].

HY-N10192

Aculene D	Infection Microorganisms Classification of Application Fields Terpenoids Sesquiterpenes Disease Research Fields Source Classification	Endogenous Metabolite Bacterial
Aculene D, a fungal metabolite, shows quorum sensing (QS) inhibitory activity against Chromobacterium violaceum CV026, and could significantly reduce violacein production in N-hexanoyl-l-homoserine lactone (C6-HSL) induced C. violaceum CV026 cultures at sub-inhibitory concentrations .

HY-133683R

N-(3-Oxotetradecanoyl)-DL-homoserine lactone (Standard) 3-Oxo-C14-AHL (Standard)	Natural Products Microorganisms Source Classification	Bacterial Reference Standards
N-(3-Oxotetradecanoyl)-DL-homoserine lactone (Standard) is the analytical standard of N-(3-Oxotetradecanoyl)-DL-homoserine lactone. This product is intended for research and analytical applications. N-(3-Oxotetradecanoyl)-DL-homoserine lactone, a member of N-Acyl homoserine lactone (AHL) from gram-negative bacteria, is a quorum sensing (QS) signaling molecule[1][2].

HY-N7788

cis-2-Dodecenoic acid	Animals Ketones, Aldehydes, Acids Source Classification	Bacterial
cis-2-Dodecenoic acid, originally discovered in Burkholderia cenocepacia, can interfere with the bacterial quorum sensing system and inhibit bacterial biofilm formation and virulence factor production .

HY-N2867

Andrographiside	Structural Classification Acanthaceae Simsia foetida (Cav.) S.F.Blake Terpenoids Diterpenoids Plants Source Classification	Bacterial
Andrographiside is a labdane diterpenoid glucoside that can be isolated from the leaves of Andrographis paniculata Nees. Andrographiside has antihepatotoxic and antioxidative effects. Andrographiside shows protective effects on mice with hepatotoxicity induced by carbon tetrachloride or tert-butylhydroperoxide (tBHP) . Andrographiside is a novel biofilm inhibitor of Pseudomonas aeruginosa PAO1 by modulating quorum-sensing proteins .

HY-W012572R

D-Histidine (Standard)	Microorganisms Source Classification	Reference Standards Mitochondrial Metabolism Bacterial
D-Histidine (Standard) is the analytical standard of D-Histidine (HY-W012572). This product is intended for research and analytical applications. D-Histidine is an anti-biofilm agent that targets bacterial quorum sensing systems (such as RhlI/RhlR pathway) and has antibacterial activity. D-Histidine works by non-covalently binding to bacterial regulatory factors or copper ion complexes, selectively inhibiting bacterial biofilm formation and motility. D-Histidine downregulates quorum sensing-related gene expression, reduces the synthesis of virulence factors (such as alginate and proteases), and interferes with bacterial membrane stability, inhibiting biofilm formation, promoting the disintegration of mature biofilms, and enhancing antibiotic sensitivity. D-Histidine is also an efficient catalyst for the salt-induced peptide formation (SIPF) reaction, which promotes the condensation of amino acids to form dipeptides (such as dialanine and dilysine) by forming a complex with copper ions (Cu ²⁺) .

HY-W008270R

2(5H)-Furanone (Standard) γ-Crotonolactone (Standard)	Structural Classification Natural Products Endogenous metabolite Source Classification	Reference Standards Endogenous Metabolite
2(5H)-Furanone (Standard) is the analytical standard of 2(5H)-Furanone. This product is intended for research and analytical applications. 2(5H)-Furanone (γ-Crotonolactone) is an endogenous metabolite. 2(5H)-Furanone mimics N-acyl homoserine lactone signals, occupies the binding site of LuxR homologs, and interferes with quorum sensing-mediated gene regulation. 2(5H)-Furanone inhibits quorum sensing mediated by AHLs with different acyl chain lengths. 2(5H)-Furanone inhibits biofilm formation of environmental Aeromonas hydrophila strains on polystyrene plates. 2(5H)-Furanone suppresses spike-and-wave discharges in a rat model of generalized absence seizures and exhibits selective activity against absence seizures. 2(5H)-Furanone can be used in studies related to bacteria infections and generalized absence seizures.

HY-N10572

Antibacterial synergist 2	Microorganisms Antibiotics Antibacterial Disease Research	Bacterial
Antibacterial synergist 2 (compound 27) is a biofilm inhibitor. Antibacterial synergist 2 shows inhibitory effects to S. enterica, S. aureus, P. aeruginosa and C. albicans. Antibacterial synergist 2 can be used for the research related to biofilm-forming pathogens .

HY-W010608R

2-Methyltetrahydrofuran-3-one (Standard)	Structural Classification other families Ketones, Aldehydes, Acids Plants Source Classification	Bacterial Reference Standards
2-Methyltetrahydrofuran-3-one (Standard) is the analytical standard of 2-Methyltetrahydrofuran-3-one. This product is intended for research and analytical applications. 2-Methyltetrahydrofuran-3-one is a quorum sensing inhibitor that can inhibit biofilm formation by H. alvei. 2-Methyltetrahydrofuran-3-one is one of the volatile constituents of roasted coffee[1][2].

HY-N12165

1,3,5,6-Tetrahydroxy-8-methylxanthone	Flavonoids Microorganisms Xanthones Phenols Other Flavonoids Source Classification	Others
1,3,5,6-Tetrahydroxy-8-methylxanthone (compound 8) is a dimeric 1,4-benzoquinone derivative isolated from the marine-derived fungus Penicillium genus .

HY-W015818R

2-Benzoxazolinone (Standard) 2-Benzoxazolone (Standard); 1,3-Benzoxazol-2(3H)-one (Standard); 2-Hydroxybenzoxazole (Standard)	Alkaloids Structural Classification Other Alkaloids Gramineae Secale cereale Plants Source Classification	Reference Standards Parasite
2-Benzoxazolinone (Standard) is the analytical standard of 2-Benzoxazolinone. This product is intended for research and analytical applications. 2-Benzoxazolinone is an anti-leishmanial agent with an LC50 of 40 μg/mL against L. donovani . A building block in chemical synthesis. 1,3-Benzoxazol-2(3H)-one derivatives have antimicrobial activity against a selection of Gram-positive, Gram-negative bacteria and yeasts . Derivatives as anti-quorum sensing agent[4].

HY-B0914AR

10-Undecenoic acid zinc salt (Standard) Zinc undecylenate (Standard)	Structural Classification Microorganisms Ketones, Aldehydes, Acids Source Classification	Reference Standards Fungal Amyloid-β Reactive Oxygen Species (ROS) Proteasome Bacterial
10-Undecenoic acid (zinc salt) (Standard) is the analytical standard of 10-Undecenoic acid (zinc salt). This product is intended for research and analytical applications. 10-Undecenoic acid zinc salt (Undecylenic acid zinc salt) is an antifungal agent. 10-Undecenoic acid zinc salt inhibits Aβ oligomerization, scavenges ROS and inhibits μ-calpain activity. 10-Undecenoic acid zinc salt has neuroprotective effects. 10-Undecenoic acid zinc salt has anticancer effects on a variety of tumors. 10-Undecenoic acid zinc salt inhibits C. albicans biofilm formation and MRSA infection. 10-Undecenoic acid zinc salt inhibits quorum sensing signals of Bacillus subtilis and Pseudomonas aeruginosa .

HY-N17297

Leotiomycene C	Structural Classification Microorganisms Phenols Polyphenols Source Classification	Fungal
Leotiomycene C is an isoprenylated bisresorcinol natural product present in the freshwater fungus Helotiales sp. Leotiomycene C inhibits the quorum sensing system of methicillin (HY-121544)-resistant Staphylococcus aureus (MRSA), with an IC₅₀ of 6.3-12.5 μM. Leotiomycene C is applicable to research related to MRSA infections .

Cat. No.	Product Name	Chemical Structure

HY-Y0248AS

(E,E)-Farnesol-d6
(E,E)-Farnesol-d₆ (trans,trans-Farnesol-d₆) is deuterium labeled (E,E)-Farnesol (HY-Y0248). (E,E)-Farnesol (trans,trans-Farnesol) is a quorum-sensing molecule of Candida species. (E,E)-Farnesol can inhibit the growth, metabolism and biofilm formation of various Candida species, and affect their morphology and invasiveness .

HY-W738271

Veratryl alcohol-13C

Veratryl alcohol- ¹³C (3,4-Dimethoxybenzyl alcohol- ¹³C) is the ¹³C-labeled Veratryl alcohol (HY-107858). Veratryl alcohol (3,4-Dimethoxybenzyl alcohol) is a secondary metabolite of lignin-degrading fungi, commonly used as a substrate for lignin peroxidase (LiP) to measure lignin degradation activity. Veratryl alcohol protects LiP from inactivation by H2O2 and prevents the accumulation of LiP III compounds. Veratryl alcohol also acts as a stabilizer for manganese-dependent peroxidases (MnP). Veratryl alcohol is a quorum-sensing inhibitor (QSI) and exhibits antibacterial efficacy .

HY-124352S

2-Nonyl-3-hydroxy-4-quinolone-d4
2-Nonyl-3-hydroxy-4-quinolone-d₄ (C9-PQS-d₄) is deuterium labeled 2-Nonyl-3-hydroxy-4-quinolone. 2-nonyl-3-hydroxy-4-Quinolone (C9-PQS) is a quinolone compound produced by P. aeruginosa and other related bacterias. 2-nonyl-3-hydroxy-4-Quinolone is a quorum sensing (QS) signal molecule that controls the expression of many virulence genes as a function of cell population density .

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