[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [O][=C][Branch1][N][C][=C][C][=C][C][Branch1][C][O][=C][Ring1][#Branch1][C][=C][C][=C][C][Branch1][C][O][=C][Ring1][#Branch1]>>[O][C][=C][C][=C][C][Branch1][S][C][Branch1][C][O][C][=C][C][=C][C][Branch1][C][O][=C][Ring1][#Branch1][=C][Ring1][#C]"}, {"from": "gpt", "value": "[C][C][O].[Cl].[O].[BH4-1].[Na+1]"}]