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