[{"from": "human", "value": "Based on the given chemical reaction, can you propose some likely reagents that might have been utilized? [C][C][Branch1][C][C][C][C][N].[O][=C][C][=C][C][=C][Branch1][C][O][C][Branch1][C][Br][=C][Ring1][Branch2]>>[C][C][Branch1][C][C][C][C][N][C][C][=C][C][=C][Branch1][C][O][C][Branch1][C][Br][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[C][O].[BH4-1].[Na+1]"}]