3,8-diethyl-8,12-di(methoxycarbonylmethyl)-2,7,13,17-tetramethyl-1,19-bilindione

5'-t-butoxycarbonyl-4'-ethyl-4-(2-methoxycarbonylethyl)-3,3'-dimethylpyrro-methane-5-carboxylic acid

mesobiliverdin IXa dimethyl ester