Using O=[N+]([O-])c1cc(Cl)cnc1Cl, COC(=O)C(C)Oc1ccc(O)cc1 to produce COC(=O)C(C)Oc1ccc(Oc2ncc(Cl)cc2[N+](=O)[O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.