[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][O][C][=Branch1][C][=O][/C][=C][/C]"}, {"from": "gpt", "value": "The molecule appears as a clear colorless liquid with a pungent odor. Less dense than water and insoluble in water. Vapors heavier than air."}]