5-[(4-bromophenyl)methyl]-2,2-dimethyl-1,3-dioxane-4,6-dione

4-(3-氯苯基)-3-氧丁酸乙酯

2,5-二氢-4-羟基-2-氧代-1H-吡咯-1-甲酸叔丁酯

N-苄基乙酰胺

丙酮