Using CCOC(=O)C(C=O)Cc1cc(OC)c(OC)c(OC)c1, N=C(N)N[N+](=O)[O-] to produce COc1cc(Cc2cnc(N[N+](=O)[O-])[nH]c2=O)cc(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.