Using N[C@H]1CC[C@H](Nc2cc(-c3cccc(NCc4cc(F)cc(F)c4)n3)c(Cl)cn2)CC1, BrCCCCBr to produce Fc1cc(F)cc(CNc2cccc(-c3cc(N[C@H]4CC[C@H](N5CCCC5)CC4)ncc3Cl)n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.