Using OCc1cc(C(Sc2ccc(Cl)cc2)c2cc(F)ccc2F)c(Cl)cn1, BrC(Br)(Br)Br to produce Fc1ccc(F)c(C(Sc2ccc(Cl)cc2)c2cc(CBr)ncc2Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.