4-(2-Acetoxyethyl)-5'-bromo-5-bromomethyl-3'-ethyl-3,4'-dimethyl-2,2'-dipyrromethene hydrobromide

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

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

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

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