4--甲氧基黄酮

2-(4-fluorophenyl)chromen-4-one

4-氯-2-氧代-2H-色烯-3-羧酸甲酯

methyl (3S,4R)-3-(2-acetyloxybenzoyl)oxy-8-methyl-8-azabicyclo[3.2.1]octane-4-carboxylate

4-羟基-2-氧代-2H-1-苯并吡喃-3-羧酸乙酯