[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [C][O][C][=C][C][=C][C][Branch1][C][O][=C][Ring1][#Branch1][O][C][C][=C][C][=C][C][=C][Ring1][=Branch1].[I][I]>>[C][O][C][=C][C][=C][Branch1][C][I][C][Branch1][C][O][=C][Ring1][Branch2][O][C][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O]"}]