[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [C][O][C][=C][C][Branch1][Ring1][O][C][=C][C][Branch1][Ring1][O][C][=C][Ring1][#Branch2].[I][I]>>[C][O][C][=C][C][Branch1][Ring1][O][C][=C][Branch1][C][I][C][Branch1][Ring1][O][C][=C][Ring1][O]"}, {"from": "gpt", "value": "[C][C][O].[O-1][I+2][Branch1][C][O-1][O]"}]