[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][C][O][C][=Branch1][C][=O][C][C][=C][S][C][=C][N][=C][N][Ring1][Branch2][Ring1][Branch1]>>[O][C][C][C][=C][S][C][=C][N][=C][N][Ring1][Branch2][Ring1][Branch1]"}, {"from": "gpt", "value": "[C][O].[Cl].[BH4-1].[Na+1]"}]