[{"from": "human", "value": "Generate a molecule based on the given description. The molecule appears as a colorless to light yellow colored liquid. Insoluble in water and denser than water. Contact may irritate skin, eyes and mucous membranes. Toxic by ingestion, inhalation or skin absorption."}, {"from": "gpt", "value": "[C][=C][O][C][=Branch1][C][=O][C][Cl]"}]