Using COC(=O)C=Cc1nc(-c2cncc(C(=O)OC)c2)ccc1[N+](=O)[O-] to produce COC(=O)c1cncc(-c2ccc3c(n2)CCC(=O)N3)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.