4-oxo-4-(3.4-dimethoxy-phenyl)-trans-crotonic acid, (E)-ethyl 4-(3,4-dimethoxyphenyl)-4-oxobut-2-enoate, (E)ETHYL 4-(3,4-DIMETHOXYPHENYL)-4-OXO-2-BUTENOATE, (E)Ethyl 4-(3,4-dimethoxyphenyl)-4-oxo-2-butenoate (VAC), VAC, 4-Oxo-4-(3.4-dimethoxy-phenyl)-trans-crotonsaeure, Ethyl 4-(3,4-dimethoxyphenyl)-4-oxycrotonate, (E)-4-(3,4-Dimethoxyphenyl)-4-oxo-2-butenoic acid, (E)-4-(3,4-dimethoxyphenyl)-4-oxocrotonic acid ethyl aster, 4-(3,4-dimethoxyphenyl)-4-oxo-2-butenoic acid, 4-(3,4-dimethoxyphenyl)-4-oxocrotonic acid, (E)4-(3,4-dimethyoxyphenyl)-4-oxo-2-butenoate, 3-(3,4-dimethoxybenzoyl)acrylic acid, (E)Ethyl4-(3,4-dimethoxyphenyl