Using OC(CCCN1CCC(O)(c2ccc(Cl)cc2)CC1)c1ccc(F)cc1 to produce O=C(CCCN1CCC(O)(c2ccc(Cl)cc2)CC1)c1ccc(F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.