(E)-p-Chlorocinnamic acid 2-Propenoic acid, 3-(4-chlorophenyl)-, (E)- (9CI) 940-62-5 Cinnamic acid, p-chloro-, (E)- (8CI) Cinnamic acid, p-chloro-, trans- EINECS 213-373-1 NSC 52172 trans-p-Chlorocinnamic acid