Using O=[N+]([O-])c1cc(Cl)c(Cl)cc1Oc1ccccc1, Oc1cc(Cl)c(Br)cc1Cl to produce O=[N+]([O-])c1cc(Cl)c(Oc2cc(Cl)c(Br)cc2Cl)cc1Oc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.