[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a tricarboxylic acid anion resulting from the deprotonation of the three carboxy groups of bongkrekic acid; major species at pH 7.3. It is a conjugate base of a bongkrekic acid."}, {"from": "gpt", "value": "[C][C@@H1][Branch2][Ring1][#C][C][/C][=C][/C][C][/C][=C][/C][=C][\\C][C@H1][Branch1][S][/C][=Branch1][N][=C][\\C][=C][Branch1][C][/C][\\C][=Branch1][C][=O][O-1][/C][O][C][/C][=C][/C][=Branch1][#Branch1][=C][\\C][=Branch1][C][=O][O-1][/C][C][=Branch1][C][=O][O-1]"}]