5-ethoxy-1-ethylimidazole-4-carboxamide

4-carbamoyl-1,3-diethylimidazolium-5-olate

2-(benzenesulfonyl)butanenitrile

5-氧代吡咯烷-2-羧酸乙酯

ethyl 2-ethyl-3-oxo-2-phenylbutanoate