Using OB(O)c1ccc(F)cc1, CC(C)(C)OC(=O)NC1Cc2cc(Br)ccc2N(Cc2ccccc2)C1 to produce CC(C)(C)OC(=O)NC1Cc2cc(-c3ccc(F)cc3)ccc2N(Cc2ccccc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.