Using Clc1ccc2c(c1)CCNC2, CC(C)(C)CC(=O)Nc1c(Cl)cc(Br)cc1C(F)(F)F to produce CC(C)(C)CC(=O)Nc1c(Cl)cc(N2CCc3cc(Cl)ccc3C2)cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.