1-(3,4-Dimethoxyphenyl)ethan-1-one 1131-62-0 3',4'-Dimethoxyacetophenone 3,4-DIMETHOXYACETOPHENONE 3,4-Dimethoxyphenyl methyl ketone AI3-11163 Acetophenone, 3',4'-dimethoxy- (8CI) Acetoveratrone EINECS 214-468-0 Ethanone, 1-(3,4-dimethoxyphenyl)- NSC 16944 NSC 18708