[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [O][=C][C][=C][C][=C][C][Branch1][=Branch1][N+1][=Branch1][C][=O][O-1][=C][Ring1][=Branch2]>>[O][=N+1][Branch1][C][O-1][C][=C][C][=C][C][Branch1][Ring1][C][O][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[C][O].[BH4-1].[Na+1]"}]