dibenzyl 3,3'-bismethyl-4,4'-bis-(2-hydroxyethyl)pyrromethane-5,5'-dicarboxylate

benzyl 3-(β-acetoxyethyl)-4,5-dimethyl-2-pyrrolecarboxylate

benzyl 3-(2-acetoxyethyl)-5-acetoxymethyl-4-methylpyrrole-2-carboxylate

ethyl 3-(ethoxycarbonylmethyl)-4,5-dimethylpyrrole-2-carboxylate

ethyl 4-diethylaminomethyl-3-(ethoxycarbonylmethyl)-5-methylpyrrole-2-carboxylate