Using O=[N+]([O-])[O-], COc1cccc2c1CC(NC(C)=O)CC2 to produce COc1ccc([N+](=O)[O-])c2c1CC(NC(C)=O)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.