[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [C][C][C][C][C][C][=Branch1][C][=O][C][=C][C][=C][C][Branch1][#Branch2][C][=C][C][=C][C][=C][S][Ring1][Branch1][=C][Ring1][=N]>>[C][C][C][C][C][C][Branch1][C][O][C][=C][C][=C][C][Branch1][#Branch2][C][=C][C][=C][C][=C][S][Ring1][Branch1][=C][Ring1][=N]"}, {"from": "gpt", "value": "[C][C][O].[BH4-1].[Na+1]"}]