Using Oc1cc(Cl)c(Oc2ncc(C(F)(F)F)cc2Cl)c(Cl)c1, ClCC=C(Cl)Cl to produce FC(F)(F)c1cnc(Oc2c(Cl)cc(OCC=C(Cl)Cl)cc2Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.