3-Dimethylamino-2-(formylamino)acrylsaeure-ethylester

2-[4-(二甲基氨基)亚苄基]-1H-茚-1,3(2H)-二酮

2-氨基-1-甲基-1H-咪唑-5-羧酸乙酯

异氰基乙酸乙酯

4-恶唑甲酸乙酯