[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule appears as a colorless liquid. Slightly soluble in water and less dense than water. Flash point 54 \u00b0F. Vapors heavier than air. Used to make artificial flavorings and rubber."}, {"from": "gpt", "value": "[C][C][C][C][C][=O]"}]