dibenzyl 3,3'-dimethylpyrromethane-5,5'-dicarboxylate
benzyl 3-formyl-1,4,5-trimethyl-1H-pyrrole-3-carboxylate
benzyl 4,5-dimethyl-3-formyl-1H-pyrrole-2-carboxylate
3,4-dimethyl-1H-pyrrole-2-carboxylic acid
benzyl 5-acetoxymethyl-4-methylpyrrole-2-carboxylate