[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][C][O][C][=Branch1][C][=O][C][C][=C][N][=C][C][=C][Ring1][=Branch1][C][#N]>>[N][#C][C][=C][C][=N][C][=C][Ring1][=Branch1][C][C][O]"}, {"from": "gpt", "value": "[C][C][O].[BH4-1].[Na+1]"}]