SMILES: CC1=C(NC(=C1CCC(=O)O)CC2=C(C(=C(N2)/C=C/3\\NC(=O)C(=C3C=C)C)C)CCC(=O)O)/C=C/4\\NC(=O)C(=C4C=C)C
Description: The molecule is a biladiene that is a linear tetrapyrrole and a regioisomer of bilirubin IXalpha, in which the dipyrroles are of endovinyl type only. It is a member of biladienes and a dicarboxylic acid.