[{"from": "human", "value": "From the provided chemical reaction, propose some possible reagents that could have been used. [C][N].[O][=C][C][C][C][S][C][NH1][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Ring1][=Branch2][Ring1][=N]>>[C][N][C][C][C][C][S][C][NH1][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Ring1][=Branch2][Ring1][=N]"}, {"from": "gpt", "value": "[C][O].[BH4-1].[Na+1]"}]