1-(3,4-dimethoxyphenyl)-3-ethyl-5,6-dimethoxy-2-methyl-2,3-dihydro-1H-indene

3-[2-(3,4-二甲氧基苯甲酰基)-4,5-二甲氧基苯基]戊-2-酮

2-(3,4-dimethoxybenzoyl)-4,5-dimethoxybenzoic acid