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

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

5,5-二甲基-1,3-环己二酮

6-methoxy-2,2-dimethyl-4H-1,3-dioxin-4-one

3-氧代戊酸