Using OCc1cc(Br)ccc1O, O=Cc1ccc([N+](=O)[O-])cc1 to produce O=[N+]([O-])c1ccc(C2OCc3cc(Br)ccc3O2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.