dibenzyl 3,3'-dimethyl-4,4'-bis(methoxycarbonylmethyl)pyrromethane-5,5'-dicarboxylate

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

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

methyl 4-iodo-3-(2-methoxy-2-oxoethyl)-5-methyl-1H-pyrrole-2-carboxylate

methyl 4,5-dimethyl-3-(methoxycarbonylmethyl)pyrrole-2-carboxylate