[{"from": "human", "value": "Given this chemical reaction, what are some reagents that could have been used? [C][O][C][=Branch1][C][=O][C][=N][C][=C][C][=C][Ring1][=Branch1][O][C]>>[C][O][C][=C][C][=C][N][=C][Ring1][=Branch1][C][O]"}, {"from": "gpt", "value": "[C][C][O].[C][O].[BH4-1].[Na+1]"}]