SMILES: CC1=C(/C(=C/C2=C(C(=C(N2)C(=O)C3=C(C(=C(N3)/C=C\\4/C(=C(C(=O)N4)C)C=C)C)C=C)C)CCC(=O)[O-])/NC1=O)CCC(=O)[O-]
Description: The molecule is a linear tetrapyrrole anion obtained by deprotonation of both the carboxy groups of 5-oxo-delta-bilirubin (more correctly known as 10-oxo-delta-bilirubin; see comment). It is a linear tetrapyrrole anion and a dicarboxylic acid dianion. It is a conjugate base of a 5-oxo-delta-bilirubin.