[{"from": "human", "value": "What can you tell me about this molecule? [C][C][=C][Branch2][=Branch1][O][C][=Branch1][#Branch1][=N][C][Ring1][Branch1][C][=C][/C][=C][/C][=Branch2][Branch1][O][=C][Branch2][Ring2][S][/C][=Branch2][Ring2][Branch2][=C][/C][=C][Branch2][Ring1][O][C][=Branch2][Ring1][=Branch1][=C][Branch1][Ring2][N][Ring1][Branch1][/C][=C][/C][=Branch1][#Branch2][=C][Branch1][Branch1][C][=N][\\-Ring1][Branch1][C][=C][C][C][C][C][C][=Branch1][C][=O][O][/N][\\-Ring2][Ring1][#Branch2][C][C][C][=Branch1][C][=O][O][C][C][=C]"}, {"from": "gpt", "value": "The molecule is a linear tetrapyrrole obtained by degradation of heme by an enzyme isolated from Escherichia coli O157:H7. It is a linear tetrapyrrole and a dicarboxylic acid. It is a tautomer of an anaerobilin dizwitterion."}]