[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a linear tetrapyrrole anion obtained by deprotonation of the two carboxy groups of biliverdin beta; major species at pH 7.3. It is a dicarboxylic acid dianion and a linear tetrapyrrole anion. It is a conjugate base of a biliverdin beta."}, {"from": "gpt", "value": "[C][C][=C][Branch2][=Branch1][=Branch1][/C][=Branch2][Branch1][N][=C][/C][=C][Branch2][Ring2][#C][C][=Branch2][Ring2][#Branch2][=C][Branch1][Ring2][N][Ring1][Branch1][/C][=C][/C][=Branch2][Ring1][=N][=C][Branch2][Ring1][#Branch1][/C][=Branch1][P][=C][/C][=N][C][=Branch1][C][=O][C][=Branch1][Branch1][=C][Ring1][=Branch1][C][C][=C][/N][\\-Ring1][#C][C][=C][C][C][C][C][C][=Branch1][C][=O][O-1][/N][C][Ring2][Ring2][Ring2][=O][C][C][C][=Branch1][C][=O][O-1]"}]