1202-39-7 2-Propenoic acid, 3-(3,4-dichlorophenyl)- 3',4'-Dichlorocinnamic acid 3,4-DICHLOROCINNAMIC ACID 3-(3,4-Dichlorophenyl)-2-propenoic acid BRN 1872129 Cinnamic acid, 3,4-dichloro- (8CI) EINECS 214-866-4 NSC 518800