[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a tricarboxylic acid trianion obtained by deprotonation of the three carboxy groups of cis-trihomoaconitic acid; major species at pH 7.3. It is a conjugate base of a cis-trihomoaconitic acid."}, {"from": "gpt", "value": "[C][Branch1][Branch2][C][C][C][=Branch1][C][=O][O-1][C][/C][=Branch1][#Branch1][=C][/C][=Branch1][C][=O][O-1][/C][=Branch1][C][=O][O-1]"}]