Using COc1ccccc1C(=O)c1ccc(Nc2ccccc2[N+](=O)[O-])cc1 to produce O=C(c1ccc(Nc2ccccc2[N+](=O)[O-])cc1)c1ccccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.