Using OO, CC(=Cc1ccc(C(C)(C)C)cc1)CN1CCCCC1 to produce CC(=Cc1ccc(C(C)(C)C)cc1)C[N+]1([O-])CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.