Using O=[N+]=O, CC1(C)C=C(n2cc(CO)ccc2=O)c2cc(C#N)ccc2O1 to produce CC1(C)C=C(n2cc(CO[N+](=O)[O-])ccc2=O)c2cc(C#N)ccc2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.