Using FC(F)(F)c1nc2cc(Cl)c(Cl)cc2nc1Cl, CS(=O)O to produce CS(=O)(=O)c1nc2cc(Cl)c(Cl)cc2nc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.