[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][C][=N][C][Ring1][Branch1][C][C][C][C][=Branch1][Ring2][=N][Ring1][Branch1][/C][=C][/C][C][C][=Branch1][Ring2][=N][\\-Ring1][Branch1][/C][=C][/C][C][/C][=Branch1][Branch1][=C][\\-Ring2][Ring1][Ring2][/N][\\-Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a tetrapyrrole fundamental parent that is the core macrocycle of vitamin B12. It has a role as a cofactor. It is a member of corrins and a tetrapyrrole fundamental parent."}]