4-(2-{[(3-乙基-4-甲基-2-氧代-2,5-二氢-1H-吡咯-1-基)羰基]氨基}乙基)苯磺酰氯

ethyl 3-cyano-2-ethyl-3-hydroxybutanoate

2-乙基乙酰乙酸乙酯

3-乙基-4-甲基-3-吡咯啉-2-酮

1-acetyl-4-ethyl-3-methyl-2H-pyrrol-5-one