2-ethyl-6-methyl-1,3-oxazin-4-one

5-acetyl-2,6-diethyl-3H-pyrimidin-4-one

3-oxo-N-(2-phenylacetyl)butanamide

N-(1,3-苯并二氧戊环-5-基甲基)-3-氧代-丁酰胺

6-methyl-2-phenyl-1,3-oxazin-4-one