5,5-dibutyl-2,2-dimethyl-1,3-dioxane-4,6-dione

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

3-oxo-3-(pyridin-3-ylamino)propanoic acid

5-(1-羟基乙亚基)-2,2-二甲基-1,3-二氧杂环己-4,6-二酮

2-amino-5,5-dimethyl-4,5,6,7-tetrahydro-1,2,4-triazolo[1,5-a]pyrimidin-7-one