2,4-bis(2-acetoxyethyl)-γ-benzoyloxy-6,7-bis(2-methoxycarbonylethyl)-1,3,5,8-tetramethylporphyrin

2,8-bis-(2-chloroethyl)-6,7-bis-(2-methoxycarbonylethyl)-3,7,12,18-tetramethylporphin

3,3'-dimethyl-4,4'-bis-(2-acetoxyethyl)pyrromethane-5,5'-dicarboxylic acid

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