tolcapone   Click here for help

GtoPdb Ligand ID: 6646

Synonyms: Ro 40-7592 | Ro-407592 | Tasmar®
Approved drug PDB Ligand
tolcapone is an approved drug (EMA (1997), FDA (1998))
Compound class: Synthetic organic
Comment: Tolcapone is a selective, potent and reversible nitro catechol type inhibitor of enzyme catechol-O-methyl transferase (COMT). As a result of reported hepatoxicity complications tolcapone has been withdrawn from the market in a number of countries.
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2D Structure
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Physico-chemical Properties
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Hydrogen bond acceptors 1
Hydrogen bond donors 2
Rotatable bonds 3
Topological polar surface area 100.67
Molecular weight 273.06
XLogP 4.11
No. Lipinski's rules broken 0
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Canonical SMILES Cc1ccc(cc1)C(=O)c1cc(O)c(c(c1)[N+](=O)[O-])O
Isomeric SMILES Cc1ccc(cc1)C(=O)c1cc(O)c(c(c1)[N+](=O)[O-])O
InChI InChI=1S/C14H11NO5/c1-8-2-4-9(5-3-8)13(17)10-6-11(15(19)20)14(18)12(16)7-10/h2-7,16,18H,1H3
Selectivity at enzymes
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Target Sp. Type Action Value Parameter Concentration range (M) Reference
Catechol-O-methyltransferase Primary target of this compound Hs Inhibitor Inhibition 9.5 – 9.6 pKi - 1
pKi 9.6 (Ki 2.7x10-10 M) soluble enzyme [1]
Description: soluble enzyme
pKi 9.5 (Ki 2.9x10-10 M) membrane-bound enzyme [1]
Description: membrane-bound enzyme