[{"from": "human", "value": "Describe this molecule. [C][Branch2][Ring1][Ring1][C][C@@][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is tricarboxylate anion of (2R)-homocitric acid. It is a conjugate base of a (2R)-homocitric acid."}]