Using CCOC(=O)C(CC(C)C)C(C)=O, N=C(N)N[N+](=O)[O-] to produce Cc1nc(N[N+](=O)[O-])[nH]c(=O)c1CC(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.