[{"from": "human", "value": "Given the following chemical reaction, what are some potential reagents that could have been employed? [C][O][C][=C][C][Branch1][=Branch1][N+1][=Branch1][C][=O][O-1][=C][C][=C][Ring1][=Branch2][Br]>>[O][=N+1][Branch1][C][O-1][C][=C][C][=C][Branch1][C][Br][C][Branch1][C][O][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[Cl].[Cl][C][Cl].[Al+3].[Cl-1].[Cl-1].[Cl-1]"}]