[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [Br][C][=C][C][Branch1][C][Br][=C][C][Branch1][C][Br][=C][Ring1][Branch2].[C][O][B][Branch1][Ring1][O][C][O][C]>>[O][B][Branch1][C][O][C][=C][C][Branch1][C][Br][=C][C][Branch1][C][Br][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[C][C][C][C][C][C].[C][C][O][C][C].[Cl].[Li][C][C][C][C]"}]