4-(2,3,4-trimethoxyphenyl)butanoic acid

1,2,3-三甲氧基苯

methyl 3-(2,3,4-trimethoxybenzoyl)propionate

4-氧代-4-(2,3,4-三甲氧基苯基)丁酸

乙基4-氧代-4-(2,3,4-三甲氧基苯基)丁酸酯