[{"from": "human", "value": "Describe this molecule. [C][C][=C][Branch2][Branch1][=Branch2][N][C][=Branch1][O][=C][Ring1][Branch1][C][C][C][=Branch1][C][=O][O-1][C][C][=C][Branch2][Ring1][=C][C][=Branch2][Ring1][=Branch2][=C][Branch1][Ring2][N][Ring1][Branch1][/C][=C][/C][=Branch1][N][=C][Branch1][Branch2][C][=Branch1][C][=O][N][\\-Ring1][=Branch1][C][C][=C][C][C][C][C][=Branch1][C][=O][O-1][/C][=C][/C][=Branch1][=N][=C][Branch1][Branch2][C][=Branch1][C][=O][N][\\-Ring1][=Branch1][C][=C][C]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid dianion obtained by deprotonation of the two carboxy groups of bilirubin; major species at pH 7.3. It has a role as a human metabolite. It is a linear tetrapyrrole anion and a dicarboxylic acid dianion. It is a conjugate base of a bilirubin IXalpha."}]