diethyl 5-formyl-1,3-dimethylpyrrole-2,4-dicarboxylate

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

3,5-二(乙氧羰基)-4-甲基-1H-吡咯-2-羧酸

5-甲酰基-3-甲基-1H-吡咯-2,4-二羧酸 4-乙酯

diethyl 5-(hydroxymethyl)-3-methyl-1H-pyrrole-2,4-dicarboxylate