Using COC(=O)CSc1c(Cl)ccc2c1CCN(C(=O)OC(C)(C)C)CC2 to produce CC(C)(C)OC(=O)N1CCc2ccc(Cl)c(SCCO)c2CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.