Using Clc1nnc(Cl)c(Cl)n1, Fc1cc(S)cc(C(F)(F)F)c1 to produce Fc1cc(Sc2nc(Cl)nnc2Cl)cc(C(F)(F)F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.