[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule appears as a colorless liquid with a chloroform-like odor. Vapors heavier than air. Less dense than water. May irritate skin and eyes, and be narcotic in high concentrations. A fire and explosion risk. Used to make other chemicals."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][Cl]"}]