2,3,4,5-四甲基吡咯

5-ethoxycarbonyl-3,4-dimethyl-1H-pyrrole-2-carboxylic acid

ethyl 5-acetyl-3,4-dimethyl-1H-pyrrole-2-carboxylate

3,4-二甲基-1H-吡咯-2-羧酸乙酯

2,3,4-三甲基-1H-吡咯