dibenzyl 3,3'-bis-(2-methoxycarbonylethyl)-4,4'-dimethyl-2,2'-methylenedipyrrole-5,5'-dicarboxylate

3,3'-di(2-methoxycarbonylethyl)-4,4'-dimethyl-2,2'-dipyrrylmethane-5,5'-dicarboxylic acid

[5,5'-diformyl-4,4'-dimethyl-3,3'-bis[2-(methoxycarbonyl)ethyl]-2,2'-dipyrryl]methane

Benzyl 4-acetyl-3,5-dimethyl-1H-pyrrole-2-carboxylate

benzyl 4-(2-bromoethyl)-3,5-dimethylpyrrole-2-carboxylate