Using CC(C)(C)OC(=O)N1CCCCC1=O, Fc1ccc(F)c(Br)c1 to produce CC(C)(C)OC(=O)N1CCCCC1(O)c1cc(F)ccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.