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