[{"from": "human", "value": "Given the following chemical reaction, what are some potential reagents that could have been employed? [Br][C][=C][C][=C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][Ring1][=Branch2][=C][Ring1][=N].[C][O][B][Branch1][Ring1][O][C][O][C]>>[O][B][Branch1][C][O][C][=C][C][=C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][Ring1][=Branch2][=C][Ring1][=N]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[C][C][C][C][C][C].[Cl].[Li][C][C][C][C]"}]