Using OB(O)c1ccc(F)cc1, COC(=O)c1nc(Br)c(C(F)(F)F)cc1N to produce COC(=O)c1nc(-c2ccc(F)cc2)c(C(F)(F)F)cc1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.