Using CNc1ccc(Oc2ccnc(C(=O)O)c2)cc1[N+](=O)[O-], On1nnc2cccnc21 to produce CNc1ccc(Oc2ccnc(C(N)=O)c2)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.