ethyl 5-methyl-2-oxo-1,3-dihydropyrrole-4-carboxylate

3-乙酰基-2,5-吡咯烷二酮

3,3-dimethyloxirane-2-carboxamide

N-(苯胺羰基)-2-氯乙酰胺

苯并呋喃-2-甲酰胺