Using O=[N+]([O-])O, CC(C)N1CC2(COc3ccccc3OC2)OC1=O to produce CC(C)N1CC2(COc3ccc([N+](=O)[O-])cc3OC2)OC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.