[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [O][=C][Branch1][C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][Br]>>[O][C][C][=C][C][=C][C][=C][Ring1][=Branch1][Br]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[C][C][C][C][C][C].[C][C][O][C][C].[F][B][Branch1][C][F][F].[BH4-1].[Na+1]"}]