Using COC(=O)C(C=O)Cc1cnc(OC)nc1, N=C(N)N[N+](=O)[O-] to produce COc1ncc(Cc2c[nH]c(N[N+](=O)[O-])nc2=O)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.