Using COc1cc(C=O)cc(OC)c1O, O=[N+]([O-])c1ccc(CBr)cc1 to produce COc1cc(C=O)cc(OC)c1OCc1ccc([N+](=O)[O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.