[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is octaanion of preuroporphyrinogen arising from global deprotonation of the eight carboxy groups; major species at pH 7.3. It has a role as a human metabolite and a Saccharomyces cerevisiae metabolite. It is a conjugate base of a preuroporphyrinogen."}, {"from": "gpt", "value": "[C][=C][Branch2][Branch2][=Branch2][C][=Branch2][#Branch1][#C][=C][Branch1][Ring2][N][Ring1][Branch1][C][C][=C][Branch2][=Branch1][N][C][=Branch2][=Branch1][C][=C][Branch1][Ring2][N][Ring1][Branch1][C][C][=C][Branch2][Ring2][#C][C][=Branch2][Ring2][Branch1][=C][Branch1][Ring2][N][Ring1][Branch1][C][C][=C][Branch2][Ring1][C][C][=Branch1][=Branch2][=C][Branch1][Ring2][N][Ring1][Branch1][C][O][C][C][=Branch1][C][=O][O-1][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][C][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][C][C][C][=Branch1][C][=O][O-1]"}]