1-(2-acetylcyclopentyl)propan-2-one

1-(2-acetylcyclohexyl)propan-2-one

1-(3,6-dimethyl-4-oxido-[1,2]oxazolo[4,5-b]pyridin-4-ium-5-yl)ethanone

1-(5-acetyl-3,6-dimethylpyrazin-2-yl)ethanone

(9ci)-3-亚硝基-2,4-戊二酮