[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][C][=C][Branch2][=Branch1][=N][C][=Branch1][=Branch1][=N][C][Ring1][Branch1][=O][/C][=C][/C][=Branch2][Branch1][=C][=C][Branch2][Branch1][Ring1][/C][=Branch2][Ring2][O][=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][/N][\\-Ring2][Ring1][O][C][C][C][=Branch1][C][=O][O-1][C][C]"}, {"from": "gpt", "value": "The molecule is dicarboxylate anion of mesobiliverdin; major species at pH 7.3. It is a dicarboxylic acid dianion and a linear tetrapyrrole anion. It is a conjugate base of a mesobiliverdin."}]