(E)-4-(4-(Dimethylamino)phenyl)-4-oxo-2-butenoic acid (E)-4-(4-N,N-Dimethylaminophenyl)-4-oxobuten-2-oic acid 2-Butenoic acid, 4-(4-(dimethylamino)phenyl)-4-oxo-, (E)- 86867-14-3