(E)-4-(3,4,5-Trimethoxyphenyl)-4-oxo-2-butenoic acid sodium salt 2-Butenoic acid, 4-oxo-4-(3,4,5-trimethoxyphenyl)-, sodium salt, (E)- 84386-13-0 Sodium (E)-4-oxo-4-(3,4,5-trimethoxyphenyl)-2-butenoate