Using OC1(C(F)(F)F)CN(c2cc(Cl)ccc2Cl)C(c2ccc(Br)s2)=N1 to produce FC(F)(F)c1cn(-c2cc(Cl)ccc2Cl)c(-c2ccc(Br)s2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.