3-对甲氧基苯胺基-3-羰基丙酸

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

3-氧代-4-对甲苯基-丁酸乙酯

2,2-dimethyl-5-[(5-nitrofuran-2-yl)methylidene]-1,3-dioxane-4,6-dione

5-[(3-methoxyphenyl)methylidene]-2,2-dimethyl-1,3-dioxane-4,6-dione