[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [C][O][C][=Branch1][C][=O][C][C][N][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][Ring1][#Branch2]>>[O][=C][N][C][Branch1][Ring2][C][C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][Ring1][N]"}, {"from": "gpt", "value": "[C][O].[BH4-1].[Na+1]"}]