(E)-propyl 2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)acrylate;(2E)?-2-Ccyano-?3-?(3,?4-?dihydroxy-?5-?nitrophenyl)?-?2-?propenoic Acid Propyl Ester; Entacapone EP Impurity I;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;(2E)?-2-Ccyano-?3-?(3,?4-?dihydroxy-?5-?nitrophenyl)?-?2-?propenoic Acid Propyl Ester; Entacapone EP Impurity I;n-Propyl (2E)-2-Cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoate