Using CCOC(C)=O, CCS(=O)c1ccc(NC(=O)[C@@](C)(O)C(F)(F)F)c(Cl)c1Cl to produce CCS(=O)(=O)c1ccc(NC(=O)[C@@](C)(O)C(F)(F)F)c(Cl)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.