[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a tricarboxylic acid trianion that is the conjugate base of aconitic acid. It is a conjugate base of an aconitic acid."}, {"from": "gpt", "value": "[C][Branch1][#C][C][=Branch1][#Branch1][=C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}]