2-Propenoic acid, 3-(3,4-dimethoxyphenyl)-, methyl ester (9CI) 3,4-O-Dimethylcaffeic acid methyl ester 5396-64-5 AI3-23964 Cinnamic acid, 3,4-dimethoxy-, methyl ester (8CI) Methyl 3,4-dimethoxycinnamate Methyl 3,4-dimethyoxycinnamate NSC 4331