英文别名Entacapone EP Impurity I; propyl (E)-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoate; Propyl (2E)-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoate; Entacapone impurity I; 2-Propenoic acid, 2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)-, propyl ester, (2E)-; n-Propyl (2E)-2-Cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoate; (E)-propyl 2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)acrylate; Entacapone Impurity 25; Entacapone Impurity 9; Entacapen impurity I 
