[{"from": "human", "value": "Describe this molecule. [C][Branch1][=Branch1][C][=Branch1][C][=O][O][Br]"}, {"from": "gpt", "value": "The molecule appears as colorless crystals. Melting point 51 \u00b0C. Density 1.93 g / cm3. Corrosive to metals and tissue. Poisonous by ingestion. Used to cause drop of citrus fruit in harvesting."}]