(E)-4-(3,4-Dimethoxyphenyl)-4-oxo-2-butenoic acid 2-Butenoic acid, 4-(3,4-dimethoxyphenyl)-4-oxo-, (E)- 3-10-00-04602 (Beilstein Handbook Reference) 4-(3,4-Dimethoxyphenyl)-4-oxocrotonic acid 80937-23-1 Acide (E)4-(3,4-dimethoxy-phenyl)-4-oxo-2-butenoique [French] BRN 3137849 EINECS 279-631-0