[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule appears as a colorless volatile liquid with a strong odor. Denser than water. Contact severely irritates skin, eyes and mucous membranes. May be very toxic by ingestion and inhalation. May be combustible."}, {"from": "gpt", "value": "[C][=Branch1][C][=O][Branch1][=Branch2][C][Branch1][C][Cl][Branch1][C][Cl][Cl][Cl]"}]