Using Fc1cccc(Br)c1F, CC(C)(C)OC(=O)N1CC(=O)C1 to produce CC(C)(C)OC(=O)N1CC(O)(c2cccc(F)c2F)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.