Methyl 5-nitro-1H-pyrrole-2-carboxylate

1-氨基-1H-吡咯-2-羧酸甲酯

4,5-二氯-1H-吡咯-2-羧酸甲酯

3,5-dichloro-pyrrole-2-carboxylic acid methyl ester

methyl 1-(p-tolylsulfonyl)pyrrole-2-carboxylate