Using Nc1cc(Cl)c(O)c(Cl)c1, FC(F)Oc1cnc(Cl)c(Cl)c1 to produce Nc1cc(Cl)c(Oc2ncc(OC(F)F)cc2Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.