Catechol O-methyltransferase (COMT) is a ubiquitous bisubstrate magnesium-dependent enzyme found in plants, animals and microorganisms. COMT catalyses the transfer of a methyl group from S-adenosyl-L-methionine (SAM) to one of the hydroxyl oxygen atoms (preferentially the 3-hydroxyl) in a catechol substrate. Physiological substrates of COMT are catecholamine neurotransmitters such as dopamine, noradrenaline, adrenaline and their metabolites. COMT also methylates catecholic steroids such as 2-hydroxyestradiol as well as a range of other catecholic compounds including neuroactive drugs such as L-dopa, α-methyldopa and isoproterenol. COMT inhibition is a means of treating Parkinson’s disease, schizophrenia and depression. There are two isoforms of human COMT: soluble cytoplasmic COMT (S-COMT), which is mainly intracellular, and a membrane-bound form (MB-COMT), which has a single-span helix contained within a 50 amino acid extension at the N-terminus. COMT is an enzyme that plays a major role in catechol neurotransmitter deactivation. Inhibition of COMT can increase neurotransmitter levels, which provides a means of treatment for Parkinson’s disease, schizophrenia and depression.


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(E)-5-Hydroxyferulic acid

(E)-5-Hydroxyferulic acid is the E-isomer of 5-hydroxyferulic acid (HY-133068). 5-hydroxyferulic acid is a hydroxycinnamic acid and is a metabolite of the phenylpropanoid pathway. 5-Hydroxyferulic acid is a precursor in the biosynthesis of sinapic acid and is also a COMT non-esterifed substrat[1][2][3].

  • CAS Number: 110642-42-7
  • MF: C10H10O5
  • MW: 210.18300
  • Catalog: COMT
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Nebicapone

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.[1].

  • CAS Number: 274925-86-9
  • MF: C14H11NO5
  • MW: 273.24100
  • Catalog: COMT
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Ro 41-0960

Ro 41-0960 is a selective catechol-O-methyltransferase(COMT) inhibitor[1].

  • CAS Number: 125628-97-9
  • MF: C13H8FNO5
  • MW: 277.20500
  • Catalog: COMT
  • Density: 1.536g/cm3
  • Boiling Point: 489.9ºC at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 250.1ºC

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.

  • CAS Number: 58264-95-2
  • MF: C10H8D4N2O
  • MW: 180.24
  • Catalog: 5-HT Receptor
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

5-Hydroxyferulic acid

5-Hydroxyferulic acid is a hydroxycinnamic acid and is a metabolite of the phenylpropanoid pathway. 5-Hydroxyferulic acid is a precursor in the biosynthesis of sinapic acid and is also a COMT non-esterifed substrate[1][2][3].

  • CAS Number: 1782-55-4
  • MF: C10H10O5
  • MW: 210.18300
  • Catalog: COMT
  • Density: 1.44g/cm3
  • Boiling Point: 449.1ºC at 760mmHg
  • Melting Point: N/A
  • Flash Point: 182.8ºC

Entacapone

Entacapone is a specific, potent, peripherally acting catechol-O-methyltransferase (COMT) inhibitor with IC50 of 151 nM for PD treatment.IC50 Value: 151 nMTarget: COMTin vitro: Entacapone 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.in vivo: Levodopa/carbidopa/entacapone has been shown to improve the pharmacokinetic profile of levodopa and provide superior symptomatic control compared with conventional levodopa/dopa decarboxylase inhibitor therapy. We report four case histories describing clinical experience of using levodopa/carbidopa/entacapone 200/50/200 mg, one of the latest doses of this formulation, in a range of patients with Parkinson's disease. These cases illustrate that levodopa/carbidopa/entacapone 200/50/200 mg provides improvements in symptomatic control.Clinical trial: The combination product carbidopa/levodopa/entacapone (CLE) was approved in 2003 for the treatment of PD patients.

  • CAS Number: 130929-57-6
  • MF: C14H15N3O5
  • MW: 305.286
  • Catalog: COMT
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 526.6±50.0 °C at 760 mmHg
  • Melting Point: 162-1630C
  • Flash Point: 272.3±30.1 °C

3-O-Methyl Tolcapone

3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone. Tolcapone is an orally active, reversible, selective and potent COMT inhibitor. Tolcapone crosses the blood-brain barrier, and can be used for treatment of Parkinson's disease[1][2].

  • CAS Number: 134612-80-9
  • MF: C15H13NO5
  • MW: 315.32100
  • Catalog: COMT
  • Density: 1.317g/cm3
  • Boiling Point: 474.8ºC at 760mmHg
  • Melting Point: N/A
  • Flash Point: 240.9ºC

Nitecapone

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[1][2][3].

  • CAS Number: 116313-94-1
  • MF: C12H11NO6
  • MW: 265.21900
  • Catalog: COMT
  • Density: 1.451g/cm3
  • Boiling Point: 495.3ºC at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 211.6ºC

Opicapone

Opicapone is an available catechol-O-methyltransferase (COMT) inhibitor. Opicapone decreases the ATP content of the cells with IC50 values of 98 μM.

  • CAS Number: 923287-50-7
  • MF: C15H10Cl2N4O6
  • MW: 413.16900
  • Catalog: COMT
  • Density: 1.80±0.1 g/cm3 (20 °C, 760 mmHg)
  • Boiling Point: 701.1±70.0 °C (760 mmHg)
  • Melting Point: N/A
  • Flash Point: N/A

Tolcapone

Tolcapone(Ro 40-7592) is an orally active selective, potent catechol-O-methyltransferase (COMT) inhibitor. IC50 value:Target: COMTTolcapone inhibits both central and peripheral COMT. Tolcapone caused a rapid and reversible inhibition of COMT activity in erythrocytes in parallel with a dose-dependent decrease in the formation of 3-OMD. Tolcapone increased the area under the concentration-time curve and elimination half-life of levodopa. Tolcapone crosses the blood-brain barrier, and has been used for L-DOPA adjunct therapy in the treatment of Parkinson's disease.

  • CAS Number: 134308-13-7
  • MF: C14H11NO5
  • MW: 273.241
  • Catalog: COMT
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 485.6±45.0 °C at 760 mmHg
  • Melting Point: 126-128ºC
  • Flash Point: 205.7±17.2 °C

Entacapone sodium salt

Entacapone is a specific, potent, peripherally acting catechol-O-methyltransferase (COMT) inhibitor with IC50 of 151 nM for PD treatment. IC50 Value: 151 nMTarget: COMTin vitro: Entacapone 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.in vivo: Levodopa/carbidopa/entacapone has been shown to improve the pharmacokinetic profile of levodopa and provide superior symptomatic control compared with conventional levodopa/dopa decarboxylase inhibitor therapy. We report four case histories describing clinical experience of using levodopa/carbidopa/entacapone 200/50/200 mg, one of the latest doses of this formulation, in a range of patients with Parkinson's disease. These cases illustrate that levodopa/carbidopa/entacapone 200/50/200 mg provides improvements in symptomatic control.Clinical trial: The combination product carbidopa/levodopa/entacapone (CLE) was approved in 2003 for the treatment of PD patients.

  • CAS Number: 1047659-02-8
  • MF: C14H14N3NaO5
  • MW: 327.26800
  • Catalog: COMT
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Serotonin hydrochloride

Serotonin 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 Ki of 44 μM.

  • CAS Number: 153-98-0
  • MF: C10H13ClN2O
  • MW: 212.676
  • Catalog: 5-HT Receptor
  • Density: N/A
  • Boiling Point: 416.1ºC at 760 mmHg
  • Melting Point: 149-154 °C(lit.)
  • Flash Point: 205.4ºC

Flopropione

Flopropione is a 5-HT1A receptor antagonist and also a catechol-o-methyltransferase (COMT) inhibitor.

  • CAS Number: 2295-58-1
  • MF: C9H10O4
  • MW: 182.17300
  • Catalog: 5-HT Receptor
  • Density: 1.372g/cm3
  • Boiling Point: 341.7ºC at 760mmHg
  • Melting Point: 177°C
  • Flash Point: 174.7ºC