Using CCS(=O)(=O)C[C@@H](O)COc1ccc(N2Cc3cc(-c4ccc(Cl)cc4)sc3C2=O)cc1OC, CC(C)[C@H](NC(=O)OC(C)(C)C)C(=O)O to produce CCS(=O)(=O)C[C@H](COc1ccc(N2Cc3cc(-c4ccc(Cl)cc4)sc3C2=O)cc1OC)OC(=O)[C@@H](NC(=O)OC(C)(C)C)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.