[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [C][O][C][=C][C][=C][N][=C][Branch1][C][Cl][NH1][C][Ring1][=Branch1][=C][Ring1][#Branch2]>>[O][C][=C][C][=C][N][=C][Branch1][C][Cl][NH1][C][Ring1][=Branch1][=C][Ring1][#Branch2]"}, {"from": "gpt", "value": "[Br][B][Branch1][C][Br][Br].[Cl][C][Cl]"}]