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