[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [C][C][O].[O][=C][Branch1][C][O][C][C][C][C][Ring1][Ring2]>>[C][C][O][C][=Branch1][C][=O][C][C][C][C][Ring1][Ring2]"}, {"from": "gpt", "value": "[O].[O][=S][=Branch1][C][=O][Branch1][C][O][O]"}]