Using Cc1c(C(F)(F)F)nn(C(C)C)c1OC(F)F, O=C1CCC(=O)N1Br to produce CC(C)n1nc(C(F)(F)F)c(CBr)c1OC(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.