6-(4-nitrophenyl)-1,3-diazinane-2,4-dione

2,2-Dimethyl-5-((thiophen-3-ylamino)methylene)-1,3-dioxane-4,6-dione

methyl 5,5,5-trifluoro-3-oxopentanoate

2,2-dimethyl-5-[2-(4-nitrophenyl)acetyl]-1,3-dioxane-4,6-dione

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