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