[{"from": "human", "value": "Based on the given chemical reaction, can you propose some likely reagents that might have been utilized? [C][O][C][C][=C][C][Branch1][=Branch1][C][Branch1][C][C][C][=N][C][Branch1][C][N][=N][Ring1][#Branch2]>>[C][C][Branch1][C][C][C][=C][C][Branch1][Ring1][C][O][=N][C][Branch1][C][N][=N][Ring1][=Branch2]"}, {"from": "gpt", "value": "[Br][B][Branch1][C][Br][Br].[Cl][C][Cl]"}]