[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][Branch1][=Branch2][C][C][O][C][=Branch1][C][=O][C][O][C]"}, {"from": "gpt", "value": "The molecule appears as a liquid with an acrid odor. Flash point near 140 \u00b0F. Slightly less dense than water. Vapors much heavier than air. May irritate skin, eyes, and mucous membranes."}]