Using O=[N+]([O-])c1ccc(F)c(F)c1, CCOC(=O)C1=Cc2ccc(O)cc2OC1C(F)(F)F to produce CCOC(=O)C1=Cc2ccc(Oc3ccc([N+](=O)[O-])cc3F)cc2OC1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.