Using C[O-], CC(C)(C)OC(=O)N1C[C@H](NC(=O)c2ccc(Cl)s2)C[C@H]1COS(C)(=O)=O to produce COC[C@@H]1C[C@@H](NC(=O)c2ccc(Cl)s2)CN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.