[{"from": "human", "value": "Describe this molecule. [C][C][=C][Branch2][=Branch1][S][C][=C][C][=N][C][=Branch2][Branch1][=Branch2][=C][C][=C][Branch2][Branch1][C][C][=Branch2][Ring2][#Branch1][=C][Branch1][Ring2][N-1][Ring1][Branch1][C][=C][C][=Branch2][Ring1][Ring2][=C][Branch1][S][C][=Branch1][Ring2][=N][Ring1][Branch1][C][=C][Ring2][Ring1][Branch1][N-1][Ring2][Ring1][Ring2][C][C][C][C][=Branch1][C][=O][O-1][C][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][=Branch1][=C][Ring2][Ring1][S][C][C][C][C][=Branch1][C][=O][O-1][C][C][C][=Branch1][C][=O][O-1].[Fe]"}, {"from": "gpt", "value": "The molecule is a cyclic tetrapyrrole anion obtained by the deprotonation of the four carboxy functions of Fe-coproporphyrin III. It has a role as a cofactor. It is a cyclic tetrapyrrole anion and a tetracarboxylic acid anion. It is a conjugate base of a Fe-coproporphyrin III."}]