[{"from": "human", "value": "Given the following chemical reaction, what are some potential reagents that could have been employed? [C][O][C][=Branch1][C][=O][C][=C][C][Branch1][Ring1][S][C][=C][C][Branch1][C][N][=N][Ring1][=Branch2]>>[C][S][C][=C][C][Branch1][C][N][=N][C][Branch1][Ring1][C][O][=C][Ring1][=Branch2]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[BH4-1].[Li+1]"}]