Using OB(O)c1ccc2nnc(C(F)(F)F)n2c1, Fc1cc(Br)ccc1OC(F)(F)F to produce Fc1cc(-c2ccc3nnc(C(F)(F)F)n3c2)ccc1OC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.