3',4'-Dimethoxyacetophenone1-(3,4-Dimethoxyphenyl)ethan-1-one3,4-DIMETHOXYACETOPHENONE3′,4′-二甲氧基苯乙酮3′,4′-Dimethoxyacetophenone3',4'-Dimethoxyacetophenone3',4'-二甲氧基苯乙酮Acetoveratrone3,4-dimethoxyphenylacetalacetoveratrone3,4-dimethoxyphenyl methyl ketone3',4'-dimethoxyacetophenone