[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is trianion of all-trans-octaprenyl diphosphate arising from deprotonation of all three diphosphate OH groups; major species at pH 7.3 It is a conjugate base of an all-trans-octaprenyl diphosphate."}, {"from": "gpt", "value": "[C][C][=Branch2][=Branch1][N][=C][C][C][/C][=Branch2][=Branch1][Ring2][=C][/C][C][/C][=Branch2][Branch1][N][=C][/C][C][/C][=Branch2][Branch1][Ring2][=C][/C][C][/C][=Branch2][Ring2][N][=C][/C][C][/C][=Branch2][Ring2][Ring2][=C][/C][C][/C][=Branch2][Ring1][N][=C][/C][C][/C][=Branch2][Ring1][Ring2][=C][/C][O][P][=Branch1][C][=O][Branch1][C][O-1][O][P][=Branch1][C][=O][Branch1][C][O-1][O-1][/C][/C][/C][/C][/C][/C][/C][C]"}]