5-Formyl-4-methoxycarbonylmethyl-3-methyl-1H-pyrrole-2-carboxylic acid

((1Z,4Z,9Z,15Z)-7,17-Diethyl-12-methoxycarbonylmethyl-3,8,13,18-tetramethyl-porphyrin-2-yl)-acetic acid methyl ester

4-Ethyl-5-[1-(4-methoxycarbonylmethyl-3,5-dimethyl-1H-pyrrol-2-yl)-meth-(Z)-ylidene]-3-methyl-5H-pyrrole-2-carboxylic acid; hydrobromide

4-<(methoxycarbonyl)-methyl>-3,5-dimethylpyrrole-2-carboxylic acid

5-dichloromethyl-4-ethyl-3-methyl-pyrrole-2-carboxylic acid benzyl ester