Using CC(C)(C)OC(=O)NCCNc1c([N+](=O)[O-])cnc2cc(Br)ccc12 to produce CC(C)(C)OC(=O)NCCNc1c(N)cnc2cc(Br)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.