2-Propenoic acid, 3-(3,4-dimethoxyphenyl)- 2316-26-9 3,4-DIMETHOXYCINNAMIC ACID 3,4-Dimethoxyphenyl-2-propenoic acid 3-(3,4-Dimethoxyphenyl)propenoic acid AI3-24427 Caffeic acid dimethyl ether Cinnamic acid, 3,4-dimethoxy- (8CI) EINECS 219-025-5 NSC 4323 NSC 43569