(E)-4-(4-((Ethoxycarbonyl)amino)phenyl)-4-oxo-2-butenoic acid (E)-4-(4-Carbethoxyaminophenyl)-4-oxobuten-2-oic acid 2-Butenoic acid, 4-(4-((ethoxycarbonyl)amino)phenyl)-4-oxo-, (E)- 86867-11-0