Using Cc1nc(NC(=O)c2cccnc2)sc1CCO, O=[N+]([O-])O to produce Cc1nc(NC(=O)c2cccnc2)sc1CCO[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.