(E)-4-(4-Trifluoromethylphenyl)-4-oxo-2-butenoic acid (E)-4-Oxo-4-(4-(trifluoromethyl)phenyl)-2-butenoic acid 2-Butenoic acid, 4-oxo-4-(4-(trifluoromethyl)phenyl)-, (E)- 85293-41-0