[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule appears as a clear colorless liquid with a petroleum-like odor. Flash point 10 \u00b0F. Less dense than water and insoluble in water. Vapors heavier than air. Used in the manufacture of other chemicals."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=C][C][C][Branch1][C][C][Branch1][C][C][C]"}]