(E)-4-(3,4-Dichlorophenyl)-4-oxo-2-butenoic acid 2-Butenoic acid, 4-(3,4-dichlorophenyl)-4-oxo-, (E)- 80937-20-8 Acide (E)4-(3,4-dichloro-phenyl)4-oxo 2-butenoique [French]