Using CCC1(CC)C(=O)N(C(C)C)c2cc([N+](=O)[O-])c(N)cc21 to produce CCC1(CC)C(=O)N(C(C)C)c2cc(N)c(N)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.