Using O=[N+]([O-])c1ccc(F)cc1F, CC(C)(C)OC(=O)N[C@H]1CCC[C@@H]1O to produce CC(C)(C)OC(=O)N[C@H]1CCC[C@@H]1Oc1cc(F)ccc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.