3-甲基-1H-吡咯-2,4-二羧酸二乙酯

4-甲基吡咯-3-甲酸乙酯

diethyl 5-bromo-3-methyl-1H-pyrrole-2,4-dicarboxylate

diethyl 5-iodo-3-methyl-1H-pyrrole-2,4-dicarboxylate

3-ethoxycarbonyl-4-methyl-1H-pyrrole-2,5-dicarboxylic acid