2-carboxy-5-methylpyrrole-3-propionic acid

3-(2-乙氧基羰基-乙基)-5-甲基-1H-吡咯-2-羧酸乙酯

4-O-benzyl 2-O-ethyl 3-(3-ethoxy-3-oxopropyl)-5-methyl-1H-pyrrole-2,4-dicarboxylate

1H-Pyrrole-3-propanoic acid, 2-(ethoxycarbonyl)-5-methyl-

3-(2-ethoxycarbonyl-4-carboxy-5-methyl-pyrrol-3-yl)-propionic acid