Using CC(C)(C)OC(=O)NCCBr, O=[N+]([O-])c1c(Br)n[nH]c1Br to produce CC(C)(C)OC(=O)NCCn1nc(Br)c([N+](=O)[O-])c1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.