4-methoxymethyl-3,5-dimethyl-pyrrole-2-carboxylic acid ethyl ester

4-diethylaminomethyl-3,5-dimethyl-pyrrole-2-carboxylic acid ethyl ester

2,4-二甲基-5-乙氧羰基-3-吡咯甲酸

4-碘-3,5-二甲基-1H-吡咯-2-羧酸乙酯