[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is conjugate base of 2-oxophytanic acid. It is a 2-oxo monocarboxylic acid anion and a long-chain fatty acid anion. It is functionally related to a hexadecanoic acid and a hexadecanoate. It is a conjugate base of a 2-oxophytanic acid."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][C][C][C][Branch1][C][C][C][C][C][C][Branch1][C][C][C][C][C][C][Branch1][C][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1]"}]