[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [O][=N+1][Branch1][C][O-1][C][=C][C][=C][Branch1][O][C][N][C][=N][C][=C][C][=N][Ring1][=Branch1][C][=C][Ring1][=C]>>[N][C][=C][C][=C][Branch1][O][C][N][C][=N][C][=C][C][=N][Ring1][=Branch1][C][=C][Ring1][=C]"}, {"from": "gpt", "value": "[Br][Ni][Br].[C][C][C][O][C][Ring1][Branch1].[C][O].[BH4-1].[Na+1]"}]