Benzyl 5-tert-Butoxycarbonyl-4-(2-methoxycarbonylethyl)-1,3-dimethylpyrrole-2-carboxylate

Dibenzyl 3,3'-Bis(2-methoxycarbonylethyl)-1,4,4'-trimethyldipyrromethane-5,5'-dicarboxylate

5-tert-<(butyloxy)carbonyl>-3',4-bis(2-chloroethyl)-3,4'-dimethyldipyrrylmethane-5'-carboxylic acid

3,4'-Bis(2-acetoxyethyl)-3',4-dimethyldipyrromethane-5,5'-dicarbaldehyde