[{"from": "human", "value": "Describe this molecule. [C][Branch2][Ring1][Ring1][C][C@@H1][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a tricarboxylic acid trianion obtained by deprotonation of the three carboxy groups of (-)-threo-isodihomocitric acid; major species at pH 7.3. It is a conjugate base of a (-)-threo-isodihomocitric acid."}]