[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a tricarboxylic acid trianion that is the conjugate base of oxalosuccinic acid. It has a role as a fundamental metabolite. It is a conjugate base of an oxalosuccinic acid."}, {"from": "gpt", "value": "[C][Branch2][Ring1][C][C][Branch1][#Branch2][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}]