Using O=[N+]([O-])c1ccc(Cl)nc1O, CCOC(=O)C(C)Br to produce CCOC(=O)C(C)Oc1nc(Cl)ccc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.