Using CCOC(=O)c1cc2cc(OC)c(O)c([N+](=O)[O-])c2o1 to produce O=C(O)c1cc2cc(O)c(O)c([N+](=O)[O-])c2o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.