[{"from": "human", "value": "Could you provide a description of this molecule? [C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][Br]"}, {"from": "gpt", "value": "The molecule is an organobromide compound. It is used in organic synthesis for the introduction of the benzyl protecting group for alcohols and carboxylic acids. Benzyl bromide is a also strong lachrymator, as well as being intensely irritating to skin and mucous membranes. Because of these properties, it has been used as a war gas. Bromine is a halogen element with the symbol Br and atomic number 35. Diatomic bromine does not occur naturally, but bromine salts can be found in crustal rock. (L625, L674)"}]