[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [O][=C][C][C][C][Branch1][=N][O][C][=C][C][=C][Branch1][C][Br][C][=C][Ring1][#Branch1][C][C][Ring1][=C]>>[O][C][C][C][C][Branch1][=N][O][C][=C][C][=C][Branch1][C][Br][C][=C][Ring1][#Branch1][C][C][Ring1][=C]"}, {"from": "gpt", "value": "[C][C][O].[BH4-1].[Na+1]"}]