Using O=[N+]([O-])O, CCCCC(Cn1ccnc1)c1ccc(Cl)cc1Cl to produce CCCCC(Cn1ccnc1)c1cc([N+](=O)[O-])c(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.