Using COC(=O)C1(Cc2ccc(Cl)cc2)CCC(C)(COS(C)(=O)=O)C1=O to produce CC1(COS(C)(=O)=O)CCC(Cc2ccc(Cl)cc2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.