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