Using O=C1CN(C(=O)c2ccc(Cl)cc2)Cc2ccccc2N1, O=[N+]([O-])c1ccc(CCl)cc1 to produce O=C(c1ccc(Cl)cc1)N1CC(=O)N(Cc2ccc([N+](=O)[O-])cc2)c2ccccc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.