2,2-dimethyl-5-(naphthalen-1-ylmethylidene)-1,3-dioxane-4,6-dione

3-氧代月桂酸甲酯

2,2-dimethyl-5-(2-oxopropyl)-1,3-dioxane-4,6-dione

3-(3,4-二甲氧基苯基)-3-氧丁酸乙酯

(2-溴-5-甲氧基苯基)丙酸