[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [C][O][C][C][=N][C][=N][C][Branch1][C][Cl][=C][Ring1][#Branch1][C]>>[C][C][=C][Branch1][C][Cl][N][=C][N][=C][Ring1][#Branch1][C][O]"}, {"from": "gpt", "value": "[Br][B][Branch1][C][Br][Br].[Cl][C][Cl]"}]