Using O=C(OCc1ccccc1)[C@H](Cc1ccccc1)OC(=O)N1CCSC1, O=C(OO)c1cccc(Cl)c1 to produce O=C(OCc1ccccc1)[C@H](Cc1ccccc1)OC(=O)N1CCS(=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.