[{"from": "human", "value": "From the provided chemical reaction, propose some possible reagents that could have been used. [C][C][Branch1][C][O][C][=Branch1][C][=O][O].[O][C][C][Cl]>>[C][C][Branch1][C][O][C][=Branch1][C][=O][O][C][C][Cl]"}, {"from": "gpt", "value": "[C][C][=C][C][=C][C][=C][Ring1][=Branch1].[O].[O][=S][=Branch1][C][=O][Branch1][C][O][O]"}]