Using CCOC(=O)C1(NS(=O)(=O)c2ccc(Oc3ccc(F)cc3)cc2)CCOCC1 to produce O=C(O)C1(NS(=O)(=O)c2ccc(Oc3ccc(F)cc3)cc2)CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.