[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule appears as a colorless liquid with a pungent odor. Flash point 54 \u00b0F. Corrosive to metals and tissue. Vapors heavier than air. Very toxic by inhalation. Used to make other chemicals and insecticides."}, {"from": "gpt", "value": "[C][O][C][=Branch1][C][=O][Cl]"}]