Using O=C(Cl)C1CC1, NCc1ccc(Cl)c([N+](=O)[O-])c1 to produce O=C(NCc1ccc(Cl)c([N+](=O)[O-])c1)C1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.