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