[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [Br][Br].[C][C][=C][Branch1][C][Cl][C][=C][C][=C][Ring1][#Branch1][Cl]>>[C][C][=C][Branch1][C][Cl][C][=C][C][Branch1][C][Br][=C][Ring1][Branch2][Cl]"}, {"from": "gpt", "value": "[Cl][C][Branch1][C][Cl][Branch1][C][Cl][Cl].[I][I].[Fe]"}]