[{"from": "human", "value": "Generate a molecule based on this description. The molecule appears as a colorless fuming liquid with a pungent odor. Vapors irritate eyes and mucous membranes. Corrosive to metals and tissue. Density 13.9 lb / gal."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][Br]"}]