Using CC(C)(C)c1cc(C(=O)N2CCNC(=O)C2(C)C)c([N+](=O)[O-])[nH]1 to produce CC(C)(C)c1cc(C(=O)N2CCNC(=O)C2(C)C)c(N)[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.