[{"from": "human", "value": "Based on the given chemical reaction, suggest some possible reagents. [C][O][C][=C][C][=C][C][=C][N][=C][Branch1][C][N][C][Ring1][#Branch1][=C][Ring1][O]>>[N][C][=N][C][=C][C][=C][C][=C][Branch1][C][O][C][=C][Ring1][O][Ring1][#Branch1]"}, {"from": "gpt", "value": "[Br][B][Branch1][C][Br][Br].[Cl][C][Cl].[N]"}]