Using CCOC(=O)c1cc(-c2ccccc2)nc2c1cnn2C(C)C, O=[N+]([O-])O to produce CCOC(=O)c1cc(-c2ccccc2[N+](=O)[O-])nc2c1cnn2C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.