Using CC(=O)OC1CCc2ccc(OCc3ccccc3)cc2C1, O=[N+]([O-])O to produce CC(=O)OC1CCc2cc([N+](=O)[O-])c(OCc3ccccc3)cc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.