Using OB(O)c1ccc(F)c(C(F)(F)F)c1, CCOC(=O)c1ccc(Br)o1 to produce CCOC(=O)c1ccc(-c2ccc(F)c(C(F)(F)F)c2)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.