[{"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][Branch1][C][Cl][C][=C][Ring1][#Branch1][Cl]>>[O][C][=C][Branch1][C][Cl][C][=C][Branch1][C][Cl][C][=C][Ring1][Branch2][Br]"}, {"from": "gpt", "value": "[C][C][Branch1][C][C][Branch1][C][C][N].[C][C][=C][C][=C][C][=C][Ring1][=Branch1]"}]