3,4-二甲基-1H-吡咯-2-羧酸乙酯

Benzamidomalonic acid, diethyl ester

diethyl 2-methoxyiminopropanedioate

diethyl 2-formamido-2-(1H-indol-3-ylmethyl)propanedioate

4-(2-羧基-乙基)-3,5-二甲基-1H-吡咯-2-羧酸乙酯