[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][/C][=C][/C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a 2-oxo monocarboxylic acid anion. It is a conjugate base of a 2-oxohex-4-enoic acid."}]