(E)-alpha-Cyano-N,N-diethyl-3,4-dihydroxy-5-nitrocinnamamide 116314-67-1 130929-57-6 2-Propenamide, 2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)-N,N-diethyl-, (2E)- Comtan ENTACAPONE Entacapona [INN-Spanish] Entacapone [USAN:INN] Entacaponum [INN-Latin] OR 611