Using Cc1cccc(N2CCC(c3cc(Cl)c(Cl)c(Cl)c3)(C(F)(F)F)C2)n1, BrBr to produce Cc1nc(N2CCC(c3cc(Cl)c(Cl)c(Cl)c3)(C(F)(F)F)C2)ccc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.