[{"from": "human", "value": "Generate a molecule based on this description. The molecule appears as a clear colorless liquid with a strong chlorine-like odor. Flash point 80 \u00b0F. Less dense than water. Vapors heavier than air."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C][=Branch1][C][=O][C]"}]