Using CCOC(=O)c1nn(-c2c(F)cc(C(F)(F)F)cc2Cl)c(C)c1SC(F)(F)F, O=C(O)C(F)(F)F to produce CCOC(=O)c1nn(-c2c(F)cc(C(F)(F)F)cc2Cl)c(C)c1S(=O)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.