Using COC(=O)c1cc(O)c(C(=O)OC)s1, O=[N+]([O-])O to produce COC(=O)c1sc(C(=O)OC)c([N+](=O)[O-])c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.