Using Cn1nc(-c2cc(N)c(Cl)cc2Cl)cc1OC(F)F, BrBr to produce Cn1nc(-c2c(Cl)cc(Cl)c(N)c2Br)cc1OC(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.