英文别名Entacapone Impurity 7; Ethyl (2E)-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoate; Entacapone EP Impurity B; OR 545; OR-545; ethyl (E)-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoate; Ethyl(2E)-2-Cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoate; 2-Propenoic acid, 2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)-, ethyl ester; (E)-Ethyl 2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)acrylate; 2-Cyano-3-(3,4-dihydroxy-5-nitro-phenyl)-acrylic acid ethyl ester 
