Using O=[N+]([O-])O, CCOC(=O)C(O)CCc1ccc(C2CCCCC2)cc1 to produce CCOC(=O)C(O)CCc1ccc(C2CCCCC2)c([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.