3-氰基-1H-吡唑-4-羧酸乙酯

2-(1-aziridinyl)-, 1,4-diethyl ester Butanedioic acid

2-二乙氧基硫代膦酰硫基丁二酸二乙基酯

diethyl 2-benzoylbutanedioate

diethyl 2-oxoimidazolidine-4,5-dicarboxylate