[{"from": "human", "value": "Provide a description of this molecule. [C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][C][Br]"}, {"from": "gpt", "value": "The molecule appears as a crystalline solid or a liquid with a sharp odor. Toxic by inhalation, ingestion and skin absorption. A severe eye irritant (a lachrymator). Used to make other chemicals."}]