t-butyl 5'-carboxy-3-(3-methoxycarbonylpropyl)-4'-(2-methoxycarbonylethyl)-3',4-dimethyl-2,2'-methylenedipyrrole-5-carboxylate

4-[(5Z,10Z,14Z,19Z)-8,12,17-Tris-(2-methoxycarbonyl-ethyl)-3,7,13,18-tetramethyl-porphyrin-2-yl]-butyric acid methyl ester

benzyl 2-methoxycarbonyl-3-(3-methoxycarbonylpropyl)-4-methylpyrrole-5-carboxylate