Using CC(Br)Br, O=[N+]([O-])c1ccc(O)c([N+](=O)[O-])c1 to produce O=[N+]([O-])c1ccc(OCCBr)c([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.