[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [Br][Br].[O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][C][C][C][Ring1][=Branch1]>>[O][C][=C][C][=C][Branch1][C][Br][C][=C][Ring1][#Branch1][C][C][C][C][Ring1][=Branch1]"}, {"from": "gpt", "value": "[Cl][C][Branch1][C][Cl][Branch1][C][Cl][Cl]"}]