[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule appears as a clear colorless liquid. Denser than water and insoluble in water. Vapors heavier than air."}, {"from": "gpt", "value": "[C][C][C][Branch1][Ring1][C][C][C][O][C][=Branch1][C][=O][C]"}]