Using CCOC(=O)C(C#N)c1ccc(C(=O)OC)cc1[N+](=O)[O-] to produce CCOC(=O)c1c(N)[nH]c2cc(C(=O)OC)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.