Using CCOC(=O)C1=CC2(CCC1S(=O)(=O)Nc1ccc(F)cc1Cl)OCCO2 to produce O=C(O)C1=CC2(CCC1S(=O)(=O)Nc1ccc(F)cc1Cl)OCCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.