[{"from": "human", "value": "Provide a description of this molecule. [C][C][=C][Branch2][=Branch1][=Branch1][C][=C][C][=N][C][=Branch2][Ring2][#C][=C][C][=C][Branch2][Ring2][Branch2][C][=Branch2][Ring2][C][=C][Branch1][Ring2][N-1][Ring1][Branch1][C][=C][C][=Branch2][Ring1][Branch1][=C][Branch1][S][C][=Branch1][Ring2][=N][Ring1][Branch1][C][=C][Ring2][Ring1][Branch1][N-1][Ring2][Ring1][Ring2][C][=C][C][C][=C][C][C][=Branch1][N][=C][Ring2][Ring1][#Branch2][C][C][C][=Branch1][C][=O][O-1][C][C][C][C][=Branch1][C][=O][O-1].[Fe]"}, {"from": "gpt", "value": "The molecule is dicarboxylate anion of ferroheme b; major species at pH 7.3. It has a role as a Saccharomyces cerevisiae metabolite and a cofactor. It is a cyclic tetrapyrrole anion and a dicarboxylic acid dianion. It is a conjugate base of a ferroheme b."}]