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