Using COC(=O)c1nn(-c2c(Cl)cc(C(F)(F)F)cc2Cl)c(O)c1SC(F)(F)F, COS(=O)(=O)OC to produce COC(=O)c1nn(-c2c(Cl)cc(C(F)(F)F)cc2Cl)c(OC)c1SC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.