Using CC(=O)Nc1ccc(OCC(C)(C)[N+](=O)[O-])c(-c2ccnn2C)c1, O=C1CCC(=O)N1Br to produce Cn1ncc(Br)c1-c1cc(N)ccc1OCC(C)(C)[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.