5-[(5-羧基-3-乙氧羰基-4-甲基-1H-吡咯-2-基)甲基]-4-乙氧羰基-3-甲基-1H-吡咯-2-羧酸

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

2,4-二甲基-5-乙氧羰基-3-吡咯甲酸

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

4,4-Dimethyl-3-(trimethylsiloxy)-2-pentanon