hMAO-B/MB-COMT-IN-2 is a dual inhibitor of MAO-B/MB-COMT with IC 50s of 4.27 μΜ and 2.69 μΜ for hMAO-B and MB-COMT, respectively. hMAO-B/MB-COMT-IN-2 protects cells from oxidative damage that can be used in the neurodegeneration disease research, for example, Parkinson’s Disease (PD) [1].

hMAO-B/MB-COMT-IN-1 is a dual MAO-B/MB-COMT inhibitor with IC50s of 2.5 μΜ for hMAO-B and 3.84 μΜ for MB-COMT. hMAO-B/MB-COMT-IN-1 protects cells from oxidative damage that can be used in neurodegeneration disease research, for example, Parkinson’s Disease (PD) [1].

Catechol O-methyltransferase (COMT) is a key enzyme in the regulation of melatonin synthesis, which is involved in the regulation of plant growth and development, and can be inhibited by structurally specific heparin oligosaccharides.

Entacapone (OR-611) is a selective and reversible inhibitor of catechol-O-methyltransferase (COMT).

Entacapone acid (AG 1290) is a selective and reversible inhibitor of catechol-O-methyltransferase(COMT).

Rosmarinate acid(Rosemary acid) inhibits MAO-A, MAO-B and COMT enzymes with IC50s of 50.1, 184.6 and 26.7 μM, respectively

Serotonin (5-hydroxytryptamine) is a natural product from animals

Rosmarinic acid (Labiatenic acid) is widely found in plants and has antioxidant, anti-inflammatory, and antibacterial activities. It inhibits MAO-A, MAO-B, and COMT with IC50 of 50.1, 184.6, and 26.7 μM respectively.

Serotonin hydrochloride (Serotonin HCl) is an endogenous 5-HT receptor agonist, a monoamine neurotransmitter in the CNS, and a catechol O-methyltransferase (COMT) inhibitor(Ki=44 μM).

Tolcapone (Ro 40-7592) is a catechol-O-methyltransferase inhibitor used in the therapy of Parkinson disease as adjunctive therapy in combination with levodopa and carbidopa.

Nitecapone is a reversible inhibitor of S-COMT (IC50 values of 300 nM in rat liver)

Isoetharine mesylate salt (Isoetarine mesilate) is a β-adrenergic receptor agonist. it also is pregnane X receptor (PXR) activator capable of upregulating CYP450 expression.

Nebicapone is a reversible catechol-O-methyltransferase (COMT) inhibitor and 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 CO

Ro 41-0960 is used as a reversible and orally-active COMT-inhibitor.

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

Flopropione (Phloropropiophenone), a spasmolytic or antispasmodic agent, is used as a 5-HT1A receptor antagonist.

3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone which is a potent COMT inhibitor. Tolcapone crosses the blood-brain barrier and can be used for treatment of Parkinson's disease.

Entacapone sodium salt inhibits catechol-O-methyltransferase(COMT) with similar IC50 in different tissues including live, duodenum, kidney and lung, but entacapone is more active than tolcapone in those tissues. Entacapone (< 100 μM) is a potent inhibitor of α-syn and β-amyloid (Aβ) oligomerization and fibrillogenesis, and also protects against extracellular toxicity induced by the aggregation of both proteins in PC12 cells.Entacapone sodium salt is a specific, potent, peripherally acting catechol-O-methyltransferase (COMT) inhibitor with IC50 of 151 nM for PD treatment.

DHMPA is an inhibitor of catechol-O-methyltransferase (COMT), it also reduces tissue norepinephrine and blood pressure.

OR-486 is an inhibitor of catechol-O-methyl-transferase(COMT) and can be used to prepare the molybdenum (VI)- 3,5-Dinitrocatechol complex.

Opicapone (BIA 9-1067) reduces the ATP content of the cells (IC50: 98 μM). Opicapone is an effective third-generation catechol-O-methyltransferase inhibitor for the research of Parkinson's disease and motor fluctuations.

Tolcapone D7 is a deuterium-labeled Tolcapone. Tolcapone is a selective and orally active inhibitor of COMT.

4-hydroxyestrone-4-methyl ether (4-Methoxy Estrone) is the methylation of 4-OHE1, which is catalyzed by COMT.

Methylspinazarin is a naphthoquinone bacterial metabolite that has been found in Streptomyces and is an inhibitor of catechol O-methyltransferase (COMT; IC50 = 0.8 μg/ml).1 It is selective for COMT over tyrosine hydroxylase, DOPA decarboxylase, and dopamine-β-hydroxylase at 100 μg/ml. Methylspinazarin decreases blood pressure in spontaneously hypertensive rats when administered at a dose of 50 mg/kg. |1. Chimura, H., Sawa, T., Takita, T., et al. Methylspinazarin and dihydromethylspinazarin, gatechol-O-methyl transerfase inhibitors produced by Streptomyces. J. Antibiot. 26(2), 112-114 (1973).

U-0521, an inhibitor of catechol-O-methyltransferase (COMT), enhances the availability and utilization of levodopa in the brain.

5-Hydroxyferulic acid is an important hydroxycinnamic acid compound and a metabolite in the phenylpropanoid pathway. It acts as a precursor for the biosynthesis of sinapic acid and functions as a non-esterified substrate for COMT.

4-Methoxyestrone-1,2,16,16-d4 is a deuterated compound of 4-Methoxyestrone. 4-Methoxyestrone has a CAS number of 58562-33-7. 4-hydroxyestrone-4-methyl ether is the methylation of 4-OHE1, which is catalyzed by COMT.