[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule appears as a colorless liquid. Insoluble in water and denser than water. Contact may slightly irritate skin, eyes and mucous membranes. May be toxic by ingestion. Used to make other chemicals."}, {"from": "gpt", "value": "[C][O][C][=Branch1][C][=O][C][Branch1][C][Cl][Branch1][C][Cl][Cl]"}]