[{"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][C][Branch1][N][C][=C][C][=C][Branch1][C][Cl][C][=C][Ring1][#Branch1][=C][Ring1][=N]>>[O][C][C][=C][N][=C][C][Branch1][N][C][=C][C][=C][Branch1][C][Cl][C][=C][Ring1][#Branch1][=C][Ring1][=N]"}, {"from": "gpt", "value": "[C][C][O].[BH4-1].[Na+1]"}]