Using COc1ccc(C(=O)c2ccccc2)c([N+](=O)[O-])c1O to produce O=C(c1ccccc1)c1ccc(O)c(O)c1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.