Using COc1cc(C(=O)CC(=O)c2ccccc2O)cc([N+](=O)[O-])c1OC to produce O=C(CC(=O)c1ccccc1O)c1cc(O)c(O)c([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.