The chemical Entacapone has a designated molecular formula of C14H15N3O5 and a molecular weight of 305.290 g/mol. Synonyms may include: Entacapona [INN-Spanish], Entacaponum [INN-Latin], OR 611, Comtan, Entacapona, Entacaponum, UNII-4975G9NM6T, 2-Cyano-N,N-diethyl-3-(3,4-dihydroxy-5-nitrophenyl)propenamide, Comtess, OR-611, (E)-2-cyano-3-(3,4-dihydroxy-5-nitro-phenyl)-N,N-diethyl-prop-2-enamide, (E)-Entacapone (ChemID). Entacapone has been assigned a MeSH pharmacological action of: Catechol O-Methyltransferase Inhibitor.