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Results for "

COMT inhibitor

" in MedChemExpress (MCE) Product Catalog:

By Targets:	COMT (41) 5-HT Receptor (8) Amyloid-β (9) Apoptosis (11) Dopamine Receptor (2) Drug Derivative (1) Drug Metabolite (5) Endogenous Metabolite (10) Interleukin Related (1) Isotope-Labeled Compounds (8) Monoamine Oxidase (5) Reactive Oxygen Species (ROS) (9) Reference Standards (8)
By Research Areas:	Cancer (15) Inflammation/Immunology (2) Metabolic Disease (4) Neurological Disease (34)

Inhibitors & Agonists

Natural
Products

Isotope-Labeled Compounds

Targets Recommended: COMT

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-B1473A

Serotonin Maximum Cited Publications 31 Publications Verification 5-Hydroxytryptamine; 5-HT	5-HT Receptor COMT Endogenous Metabolite	Neurological Disease
Serotonin is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM.

HY-B1473

Serotonin hydrochloride Maximum Cited Publications 31 Publications Verification 5-Hydroxytryptamine hydrochloride; 5-HT hydrochloride	5-HT Receptor COMT Endogenous Metabolite	Neurological Disease
Serotonin (5-Hydroxytryptamine) hydrochloride is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist, with blood-brain barrier permeability. Serotonin hydrochloride is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM.

HY-N0529

Rosmarinic acid 15+ Cited Publications Labiatenic acid	Monoamine Oxidase COMT Apoptosis Endogenous Metabolite	Cancer
Rosmarinic acid is a widespread phenolic ester compound in the plants. Rosmarinic acid inhibits MAO-A, MAO-B and *COMT* enzymes with IC₅₀s of 50.1, 184.6 and 26.7 μM, respectively.

HY-14280

Entacapone 5+ Cited Publications	COMT	Neurological Disease Cancer
Entacapone is a potent, reversible, peripherally acting and orally active catechol-O-methyltransferase (COMT) inhibitor. Entacapone inhibits COMT from rat brain, erythrocytes and liver with IC₅₀ values of 10 nM, 20 nM, and 160 nM, respectively. Entacapone is selective for COMT over other catecholamine metabolizing enzymes, including MAO-A, MAO-B, phenolsulphotransferase M (PST-M) and PST-P (IC₅₀s>50 μM). Entacapone can be used for the research of Parkinson's disease . Entacapone serves as a inhibitor of FTO demethylation with an IC₅₀ of 3.5 μM, can be used for the research of metabolic disorders .

HY-17406

Tolcapone 3 Publications Verification Ro 40-7592	COMT Amyloid-β Apoptosis Reactive Oxygen Species (ROS)	Neurological Disease Cancer
Tolcapone (Ro 40-7592) is a selective, potent and orally active *COMT* inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-14896

Opicapone 3 Publications Verification BIA 9-1067	COMT	Neurological Disease
Opicapone (BIA 9-1067) is a potent third-generation catechol-O-methyltransferase (COMT) inhibitor for the research of Parkinson's disease and motor fluctuations. Opicapone decreases the ATP content of the cells with an IC₅₀ of 98 μM .

HY-B1473AS

Serotonin-d4 5-Hydroxytryptamine-d₄; 5-HT-d₄	Isotope-Labeled Compounds 5-HT Receptor COMT Endogenous Metabolite	Neurological Disease
Serotonin-d₄ is deuterium labeled Serotonin. Serotonin is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin is also a catechol O-methyltransferase (COMT) inhibitor with a Ki of 44 μM.

HY-100562

Flopropione	5-HT Receptor COMT	Neurological Disease
Flopropione is a 5-HT receptor antagonist and also a catechol-o-methyltransferase (COMT) inhibitor . Flopropione also as an antispasmodic agent .

HY-N0529R

Rosmarinic acid (Standard) 1 Publications Verification Labiatenic acid (Standard)	Reference Standards Monoamine Oxidase COMT Apoptosis Endogenous Metabolite	Cancer
Rosmarinic acid (Standard) is the analytical standard of Rosmarinic acid. This product is intended for research and analytical applications. Rosmarinic acid is a widespread phenolic ester compound in the plants. Rosmarinic acid inhibits MAO-A, MAO-B and COMT enzymes with IC₅₀s of 50.1, 184.6 and 26.7 μM, respectively.

HY-157719

S-Adenosylhomocysteine sulfoxide	COMT	Others
S-Adenosylhomocysteine sulfoxide is an inhibitor of catechol-O-methyltransferase (COMT) with an IC₅₀ value of 860 μM. S-Adenosylhomocysteine sulfoxide can be used in the research of methylation reaction modulators .

HY-106842

Nitecapone OR-462	COMT	Neurological Disease Inflammation/Immunology
Nitecapone (OR-462) is an orally active and short-acting catechol-O-methyltransferase (COMT) inhibitor with gastroprotective and antioxidant properties. Nitecapone (OR-462) scavenges reactive oxygen and nitric radicals and prevents lipid peroxidation .

HY-B1473S

Serotonin-d4 hydrochloride 5-Hydroxytryptamine-d4 hydrochloride; 5-HT-d4 hydrochloride	Isotope-Labeled Compounds 5-HT Receptor Endogenous Metabolite COMT	Others
Serotonin-d₄ (5-Hydroxytryptamine-d₄) hydrochloride is the deuterium labeled Serotonin (hydrochloride) (HY-B1473) . Serotonin (5-Hydroxytryptamine) hydrochloride is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin hydrochloride is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM .

HY-106405

Nebicapone BIA 3-202	COMT	Metabolic Disease
Nebicapone (BIA 3-202), a reversible catechol-O-methyltransferase (COMT) inhibitor, is mainly metabolized by glucuronidation. Nebicapone is mainly peripherally acting inhibitor that decreases the biotransformation of L-DOPA to 3-O-methyl-DOPA by inhibition of COMT, and it is potential for the treatment of Parkinson's disease .

HY-125339

Ro 41-0960	COMT	Neurological Disease
Ro 41-0960 is a selective catechol-O-methyltransferase(COMT) inhibitor .

HY-14280S

Entacapone-d10	COMT	Neurological Disease
Entacapone-d₁₀ is the deuterium labeled Entacapone. Entacapone is a potent, reversible, peripherally acting and orally active catechol-O-methyltransferase (COMT) inhibitor. Entacapone inhibits COMT from rat brain, erythrocytes and liver with IC₅₀ values of 10 nM, 20 nM, and 160 nM, respectively. Entacapone is selective for COMT over other catecholamine metabolizing enzymes, including MAO-A, MAO-B, phenolsulphotransferase M (PST-M) and PST-P (IC₅₀s>50 μM). Entacapone can be used for the research of Parkinson's disease . Entacapone serves as a inhibitor of FTO demethylation with an IC₅₀ of 3.5 μM, can be used for the research of metabolic disorders .

HY-W012264

3-O-Methyldopa monohydrate 3-Methoxy-L-tyrosine monohydrate; 3-O-Methyl-L-DOPA monohydrate	COMT	Neurological Disease
3-O-Methyldopa monohydrate (3-Methoxy-L-tyrosine monohydrate) is a significant metabolite of L-DOPA produced through the action of catechol O-methyltransferase (COMT). Unlike its precursor, 3-O-Methyldopa does not serve as a substrate or inhibitor of L-amino acid decarboxylase activity. Additionally, the inhibition of COMT can amplify the anti-Parkinson effects of L-DOPA.

HY-14280R

Entacapone (Standard)	Reference Standards COMT	Neurological Disease Cancer
Entacapone (Standard) is the analytical standard of Entacapone. This product is intended for research and analytical applications. Entacapone is a potent, reversible, peripherally acting and orally active catechol-O-methyltransferase (COMT) inhibitor. Entacapone inhibits COMT from rat brain, erythrocytes and liver with IC₅₀ values of 10 nM, 20 nM, and 160 nM, respectively. Entacapone is selective for COMT over other catecholamine metabolizing enzymes, including MAO-A, MAO-B, phenolsulphotransferase M (PST-M) and PST-P (IC₅₀s>50 µM). Entacapone can be used for the research of Parkinson's disease . Entacapone serves as a inhibitor of FTO demethylation with an IC₅₀ of 3.5 μM, can be used for the research of metabolic disorders .

HY-113468AR

3-O-Methyldopa (Standard) 3-Methoxy-L-tyrosine (Standard); 3-O-Methyl-L-DOPA (Standard)	Drug Derivative Interleukin Related Reference Standards	Neurological Disease Inflammation/Immunology
3-O-Methyldopa (Standard) is the analytical standard of 3-O-Methyldopa. This product is intended for research and analytical applications. 3-O-Methyldopa (3-Methoxy-L-tyrosine) is a metabolite of L-DOPA which is formed by catechol-O-methyltransferase (COMT). 3-O-Methyldopa competitively inhibits the pharmacodynamics of l-DOPA and dopamine .

HY-17406S1

Tolcapone-d4 Ro 40-7592-d₄	Isotope-Labeled Compounds COMT Amyloid-β Apoptosis Reactive Oxygen Species (ROS)	Neurological Disease Cancer
Tolcapone-d₄ (Ro 40-7592-d₄) is the deuterium labeled Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active *COMT* inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-151388

hMAO-B/MB-COMT-IN-1	Monoamine Oxidase COMT	Neurological Disease
hMAO-B/MB-COMT-IN-1 is a dual *MAO-B/MB-COMT* inhibitor (IC₅₀s: 2.5 μΜ for hMAO-B, 3.84 μΜ for MB-COMT). hMAO-B/MB-COMT-IN-1 protects cells against oxidative damage. hMAO-B/MB-COMT-IN-1 can be used in the research of neurodegeneration disease, such as Parkinson’s Disease (PD) .

HY-121949

U-0521	COMT	Neurological Disease
U-0521 is the inhibitor of the catechol-O-methyltransferase (COMT). U-0521 has the potential for the research of Parkinson's disease .

HY-B1473R

Serotonin hydrochloride (Standard) 5-Hydroxytryptamine hydrochloride (Standard); 5-HT hydrochloride (Standard)	5-HT Receptor Reference Standards COMT Endogenous Metabolite	Neurological Disease
Serotonin (5-Hydroxytryptamine) (Standard) hydrochloride is the analytical standard of Serotonin hydrochloride (HY-B1473). This product is intended for research and analytical applications. Serotonin (5-Hydroxytryptamine) hydrochloride is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin hydrochloride is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM.

HY-B1473S2

Serotonin-13C,D4 5-Hydroxytryptamine-¹³C,D₄; 5-HT-¹³C,D₄	Isotope-Labeled Compounds 5-HT Receptor COMT Endogenous Metabolite	Neurological Disease
Serotonin- ¹³C,D₄ (5-Hydroxytryptamine-13C,D₄) is a ¹³C- and deuterated labeled Serotonin (HY-B1473A). Serotonin is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM .

HY-14280A

Entacapone sodium salt	COMT	Neurological Disease Cancer
Entacapone sodium salt is a potent, reversible, peripherally acting and orally active catechol-O-methyltransferase (COMT) inhibitor. Entacapone sodium salt inhibits COMT from rat brain, erythrocytes and liver with IC₅₀ values of 10 nM, 20 nM, and 160 nM, respectively. Entacapone sodium salt is selective for COMT over other catecholamine metabolizing enzymes, including MAO-A, MAO-B, phenolsulphotransferase M (PST-M) and PST-P (IC₅₀s>50 µM). Entacapone sodium salt can be used for the research of Parkinson's disease . Entacapone sodium salt serves as as a inhibit of FTO demethylation with an IC₅₀ of 3.5 μM, can be used for the research of metabolic disorders .

HY-14896R

Opicapone (Standard) BIA 9-1067 (Standard)	Reference Standards COMT	Neurological Disease
Opicapone (Standard) is the analytical standard of Opicapone. This product is intended for research and analytical applications. Opicapone (BIA 9-1067) is a potent third-generation catechol-O-methyltransferase (COMT) inhibitor for the research of Parkinson's disease and motor fluctuations. Opicapone decreases the ATP content of the cells with an IC₅₀ of 98 μM .

HY-W704878

(Z)-Entacapone-d10-1	Isotope-Labeled Compounds COMT	Metabolic Disease
(Z)-Entacapone-d₁₀-1 is the deuterium labeled (Z)-Entacapone (HY-139089). (Z)-Entacapone is a metabolite of the catechol-O-methyltransferase (COMT) inhibitor Entacapone (HY-14280). It is also a potential impurity found in commercial preparations of Entacapone and a degradant of Entacapone formed by UV light exposure.

HY-W401531S

(R)-3-O-Methyldopa-d3	Dopamine Receptor Endogenous Metabolite	Neurological Disease
(R)-3-O-Methyldopa-d₃ is a deuterium labeled (R)-3-O-Methyldopa, and (R)-3-O-Methyldopa is an R-enantiomer of 3-O-Methyldopa. 3-O-Methyldopa is a metabolite of L-DOPA which is formed by catechol-O-methyltransferase (COMT). 3-O-Methyldopa competitively inhibits the pharmacodynamics of L-DOPA and dopamine .

HY-W401531S1

(R)-3-O-Methyldopa-d3 hydrochloride	Dopamine Receptor Endogenous Metabolite	Neurological Disease
(R)-3-O-Methyldopa-d₃ (hydrochloride) is a deuterium labeled (R)-3-O-Methyldopa, and (R)-3-O-Methyldopa is an R-enantiomer of 3-O-Methyldopa. 3-O-Methyldopa is a metabolite of L-DOPA which is formed by catechol-O-methyltransferase (COMT). 3-O-Methyldopa competitively inhibits the pharmacodynamics of L-DOPA and dopamine .

HY-109119

Neluxicapone	COMT	Neurological Disease
Neluxicapone, a *COMT* inhibitor, is an antiparkinsonien agent. Neluxicapone can be used for the study of Parkinson's disease (PD) .

HY-168154

COMT-IN-2	COMT	Cancer
COMT-IN-2 (compund 9) is the potent *COMT* inhibitor, showing selective inhibition of brain (IC₅₀=24 nM) and liver (IC₅₀=81 nM) MB-COMT compared to the liver S-COMT (IC₅₀=620 nM) isoform .

HY-151390

hMAO-B/MB-COMT-IN-2	Monoamine Oxidase COMT	Neurological Disease
hMAO-B/MB-COMT-IN-2 is a dual *MAO-B/MB-COMT* inhibitor (IC₅₀s: 4.27 μΜ for hMAO-B, 2.69 μΜ for MB-COMT). hMAO-B/MB-COMT-IN-2 protects cells against oxidative damage. hMAO-B/MB-COMT-IN-2 can be used in the research of neurodegeneration disease, such as Parkinson’s Disease (PD) .

HY-162760

COMT-IN-1	COMT Monoamine Oxidase	Neurological Disease
COMT-IN-1 (compound C12), a nitrophenolic analogue, is an orally active dopamine metabolic enzyme catechol-O-methyltransferase (COMT) inhibitor with IC₅₀s of 0.37 μM, 95.58 μM and 58.82 μM for COMT, MAO-A and MAO-B, respectively. COMT-IN-1 exhibits chelation with a variety of metal ions. COMT-IN-1 exhibits good BBB permeability. COMT-IN-1 improves dopamine levels and ameliorates MPTP (HY-15608)-induced Parkinson's disease (PD) symptoms in mice .

HY-156069

Methylspinazarin	COMT	Neurological Disease Cancer
Methylspinazarin is a potent inhibitor of catechol O-methyltransferase (COMT, *IC₅₀ = 0.8 μg/ml) that can be isolated from Streptomyces. Methylspinazarin is selective for COMT* over tyrosine hydroxylase .**

HY-106405R

Nebicapone (Standard) BIA 3-202 (Standard)	Reference Standards COMT	Metabolic Disease
Nebicapone (Standard) is the analytical standard of Nebicapone. This product is intended for research and analytical applications. Nebicapone (BIA 3-202), a reversible catechol-O-methyltransferase (COMT) inhibitor, is mainly metabolized by glucuronidation. Nebicapone is mainly peripherally acting inhibitor that decreases the biotransformation of L-DOPA to 3-O-methyl-DOPA by inhibition of COMT, and it is potential for the treatment of Parkinson's disease .

HY-119224

BIA 3-335	COMT	Neurological Disease
BIA 3-335 is an inhibitor for catechol-O-methyltransferase (COMT), and can be used in research about Parkinson's disease .

HY-169611

Serotonin maleate 5-Hydroxytryptamine maleate; 5-HT maleate	5-HT Receptor COMT	Neurological Disease
Serotonin hydrogen maleate is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin hydrogen maleate is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM .

HY-139089

(Z)-Entacapone	COMT	Metabolic Disease
(Z)-Entacapone is a metabolite of the catechol-O-methyltransferase (COMT) inhibitor Entacapone (HY-14280). It is also a potential impurity found in commercial preparations of Entacapone and a degradant of Entacapone formed by UV light exposure.

HY-100642

3-O-Methyltolcapone Ro 40-7591	Drug Metabolite COMT Amyloid-β Apoptosis Reactive Oxygen Species (ROS)	Neurological Disease Cancer
3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active *COMT* inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-17406R

Tolcapone (Standard) Ro 40-7592 (Standard)	Reference Standards COMT Amyloid-β Apoptosis Reactive Oxygen Species (ROS)	Neurological Disease Cancer
Tolcapone (Standard) (Ro 40-7592 (Standard)) is the analytical standard of Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active *COMT* inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-17406S

Tolcapone-d7 Ro 40-7592 d₇	Isotope-Labeled Compounds COMT Amyloid-β Apoptosis Reactive Oxygen Species (ROS)	Neurological Disease Cancer
Tolcapone-d₇ (Ro 40-7592-d₇) is the deuterium labeled Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active *COMT* inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-126194

Tolcapone 3-β-D-glucuronide Ro 61-1448	Drug Metabolite COMT Amyloid-β Apoptosis Reactive Oxygen Species (ROS)	Others
Tolcapone 3-β-D-glucuronide (Ro 61-1448) is an O-methyl metabolite of Tolcapone (HY-17406) and is pharmacologically inactive. Tolcapone (Ro 40-7592) is a selective, potent and orally active *COMT* inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-100642R

3-O-Methyltolcapone (Standard) Ro 40-7591 (Standard)	Reference Standards Drug Metabolite COMT Amyloid-β Apoptosis Reactive Oxygen Species (ROS)	Neurological Disease Cancer
3-O-Methyltolcapone (Standard) (Ro 40-7591 (Standard)) is the analytical standard of 3-O-Methyltolcapone (HY-174062). 3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active *COMT* inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-100642S

3-O-Methyltolcapone-d7 Ro 40-7591 d₇	Isotope-Labeled Compounds Drug Metabolite COMT Amyloid-β Apoptosis Reactive Oxygen Species (ROS)	Neurological Disease Cancer
3-O-Methyltolcapone-d₇ (Ro 40-7591 d₇) is a deuterium labeled 3-O-Methyltolcapone (HY-174062). 3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active *COMT* inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-100642S1

3-O-Methyltolcapone-d4 Ro 40-7591-d₄	Isotope-Labeled Compounds Drug Metabolite COMT Amyloid-β Apoptosis Reactive Oxygen Species (ROS)	Neurological Disease Cancer
3-O-Methyltolcapone-d₄ (Ro 40-7591 d₄) is a deuterium labeled 3-O-Methyltolcapone (HY-174062). 3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active *COMT* inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

Cat. No.	Product Name	Category	Target	Chemical Structure

HY-B1473A

Serotonin Maximum Cited Publications 31 Publications Verification 5-Hydroxytryptamine; 5-HT	Alkaloids Structural Classification Endogenous metabolite Indole Alkaloids	5-HT Receptor COMT Endogenous Metabolite
Serotonin is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM.

HY-B1473

Serotonin hydrochloride Maximum Cited Publications 31 Publications Verification 5-Hydroxytryptamine hydrochloride; 5-HT hydrochloride	Alkaloids Structural Classification Endogenous metabolite Indole Alkaloids Source Classification	5-HT Receptor COMT Endogenous Metabolite
Serotonin (5-Hydroxytryptamine) hydrochloride is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist, with blood-brain barrier permeability. Serotonin hydrochloride is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM.

HY-N0529

Rosmarinic acid 15+ Cited Publications Labiatenic acid	Classification of Application Fields Paramacrolobium coeruleum (Taub.) J.Léonard Labiatae Other Phenylpropanoids Phenylpropanoids Plants Endogenous metabolite Disease Research Fields Source Classification Cancer	Monoamine Oxidase COMT Apoptosis Endogenous Metabolite
Rosmarinic acid is a widespread phenolic ester compound in the plants. Rosmarinic acid inhibits MAO-A, MAO-B and *COMT* enzymes with IC₅₀s of 50.1, 184.6 and 26.7 μM, respectively.

HY-N0529R

Rosmarinic acid (Standard) 1 Publications Verification Labiatenic acid (Standard)	Structural Classification Paramacrolobium coeruleum (Taub.) J.Léonard Labiatae Other Phenylpropanoids Phenylpropanoids Plants Endogenous metabolite Source Classification	Reference Standards Monoamine Oxidase COMT Apoptosis Endogenous Metabolite
Rosmarinic acid (Standard) is the analytical standard of Rosmarinic acid. This product is intended for research and analytical applications. Rosmarinic acid is a widespread phenolic ester compound in the plants. Rosmarinic acid inhibits MAO-A, MAO-B and COMT enzymes with IC₅₀s of 50.1, 184.6 and 26.7 μM, respectively.

HY-113468AR

3-O-Methyldopa (Standard) 3-Methoxy-L-tyrosine (Standard); 3-O-Methyl-L-DOPA (Standard)	Structural Classification Monophenols Ketones, Aldehydes, Acids Phenols Endogenous metabolite Source Classification	Drug Derivative Interleukin Related Reference Standards
3-O-Methyldopa (Standard) is the analytical standard of 3-O-Methyldopa. This product is intended for research and analytical applications. 3-O-Methyldopa (3-Methoxy-L-tyrosine) is a metabolite of L-DOPA which is formed by catechol-O-methyltransferase (COMT). 3-O-Methyldopa competitively inhibits the pharmacodynamics of l-DOPA and dopamine .

HY-B1473R

Serotonin hydrochloride (Standard) 5-Hydroxytryptamine hydrochloride (Standard); 5-HT hydrochloride (Standard)	Alkaloids Structural Classification Endogenous metabolite Indole Alkaloids Source Classification	5-HT Receptor Reference Standards COMT Endogenous Metabolite
Serotonin (5-Hydroxytryptamine) (Standard) hydrochloride is the analytical standard of Serotonin hydrochloride (HY-B1473). This product is intended for research and analytical applications. Serotonin (5-Hydroxytryptamine) hydrochloride is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin hydrochloride is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM.

HY-126194

Tolcapone 3-β-D-glucuronide Ro 61-1448	Monophenols Ketones, Aldehydes, Acids Phenols Endogenous metabolite Source Classification	Drug Metabolite COMT Amyloid-β Apoptosis Reactive Oxygen Species (ROS)
Tolcapone 3-β-D-glucuronide (Ro 61-1448) is an O-methyl metabolite of Tolcapone (HY-17406) and is pharmacologically inactive. Tolcapone (Ro 40-7592) is a selective, potent and orally active *COMT* inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

Cat. No.	Product Name	Chemical Structure

HY-B1473AS

Serotonin-d4
Serotonin-d₄ is deuterium labeled Serotonin. Serotonin is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin is also a catechol O-methyltransferase (COMT) inhibitor with a Ki of 44 μM.

HY-B1473S

Serotonin-d4 hydrochloride
Serotonin-d₄ (5-Hydroxytryptamine-d₄) hydrochloride is the deuterium labeled Serotonin (hydrochloride) (HY-B1473) . Serotonin (5-Hydroxytryptamine) hydrochloride is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin hydrochloride is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM .

HY-14280S

Entacapone-d10

Entacapone-d₁₀ is the deuterium labeled Entacapone. Entacapone is a potent, reversible, peripherally acting and orally active catechol-O-methyltransferase (COMT) inhibitor. Entacapone inhibits COMT from rat brain, erythrocytes and liver with IC₅₀ values of 10 nM, 20 nM, and 160 nM, respectively. Entacapone is selective for COMT over other catecholamine metabolizing enzymes, including MAO-A, MAO-B, phenolsulphotransferase M (PST-M) and PST-P (IC₅₀s>50 μM). Entacapone can be used for the research of Parkinson's disease . Entacapone serves as a inhibitor of FTO demethylation with an IC₅₀ of 3.5 μM, can be used for the research of metabolic disorders .

HY-17406S1

Tolcapone-d4

Tolcapone-d₄ (Ro 40-7592-d₄) is the deuterium labeled Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active COMT inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-B1473S2

Serotonin-13C,D4
Serotonin- ¹³C,D₄ (5-Hydroxytryptamine-13C,D₄) is a ¹³C- and deuterated labeled Serotonin (HY-B1473A). Serotonin is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin is also a catechol O-methyltransferase (COMT) inhibitor with a K_i of 44 μM .

HY-W704878

(Z)-Entacapone-d10-1
(Z)-Entacapone-d₁₀-1 is the deuterium labeled (Z)-Entacapone (HY-139089). (Z)-Entacapone is a metabolite of the catechol-O-methyltransferase (COMT) inhibitor Entacapone (HY-14280). It is also a potential impurity found in commercial preparations of Entacapone and a degradant of Entacapone formed by UV light exposure.

HY-W401531S

(R)-3-O-Methyldopa-d3
(R)-3-O-Methyldopa-d₃ is a deuterium labeled (R)-3-O-Methyldopa, and (R)-3-O-Methyldopa is an R-enantiomer of 3-O-Methyldopa. 3-O-Methyldopa is a metabolite of L-DOPA which is formed by catechol-O-methyltransferase (COMT). 3-O-Methyldopa competitively inhibits the pharmacodynamics of L-DOPA and dopamine .

HY-W401531S1

(R)-3-O-Methyldopa-d3 hydrochloride
(R)-3-O-Methyldopa-d₃ (hydrochloride) is a deuterium labeled (R)-3-O-Methyldopa, and (R)-3-O-Methyldopa is an R-enantiomer of 3-O-Methyldopa. 3-O-Methyldopa is a metabolite of L-DOPA which is formed by catechol-O-methyltransferase (COMT). 3-O-Methyldopa competitively inhibits the pharmacodynamics of L-DOPA and dopamine .

HY-17406S

Tolcapone-d7

Tolcapone-d₇ (Ro 40-7592-d₇) is the deuterium labeled Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active COMT inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-100642S

3-O-Methyltolcapone-d7

3-O-Methyltolcapone-d₇ (Ro 40-7591 d₇) is a deuterium labeled 3-O-Methyltolcapone (HY-174062). 3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active COMT inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

HY-100642S1

3-O-Methyltolcapone-d4

3-O-Methyltolcapone-d₄ (Ro 40-7591 d₄) is a deuterium labeled 3-O-Methyltolcapone (HY-174062). 3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone (HY-17406). Tolcapone (Ro 40-7592) is a selective, potent and orally active COMT inhibitor with an IC₅₀of 773 nM. Tolcapone can inhibits α-syn and Aβ₄₂ oligomerization and fibrillogenesis. Tolcapone can cause oxidative stress and induce cancer cells apoptosis and ROS production. Tolcapone can be used for the researches of cancer and neurological disease, such as Parkinson disease and neuroblastoma .

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