Using Nc1ccc(Br)cc1Cl, O=C(O)c1cnc(Cl)c(Cl)c1Cl to produce O=C(O)c1cnc(Cl)c(Cl)c1Nc1ccc(Br)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.