[{"from": "human", "value": "Provide a description of this molecule. [C][C][=C][Branch2][Ring2][O][C][=Branch2][Ring1][S][=C][Branch1][Ring2][N][Ring1][Branch1][C][C][=C][Branch1][#C][C][=Branch1][Branch1][=C][N][Ring1][Branch1][C][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][C][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is tetracarboxylate anion of dipyrromethane cofactor; major species at pH 7.3. It has a role as a cofactor. It is a conjugate base of a dipyrromethane cofactor."}]