Using O=[N+]([O-])O, COC(=O)C[C@H]1CC[C@H](c2ccccc2)CC1 to produce COC(=O)C[C@H]1CC[C@H](c2ccc([N+](=O)[O-])cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.