Using Fc1ccc2c(c1)CNCC2, CC(C)(C)CC(=O)Nc1c(Cl)cc(Br)cc1C(F)(F)F to produce CC(C)(C)CC(=O)Nc1c(Cl)cc(N2CCc3ccc(F)cc3C2)cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.