5-氰基-1-叔丁基-1H-吡唑-4-羧酸乙酯

N-Ethyl-4-{[5-(methoxycarbamoyl)-2-methylphenyl]amino}-5-methylpy rrolo[2,1-f][1,2,4]triazine-6-carboxamide

1-氨基-3-甲基-1H-吡咯-2,4-二羧酸二乙酯

ethyl 5-cyano-4-methyl-1H-pyrrole-3-carboxylate

6-氯-5-氰基-2-甲基烟酸乙酯