Using CC(C)(C)OC(=O)Nc1nccc(Br)c1C=O, OB(O)c1ccc(Cl)cc1F to produce CC(C)(C)OC(=O)Nc1nccc(-c2ccc(Cl)cc2F)c1C=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.