Using O=C(Cc1ccccc1)N[C@@H]1C(=O)N2C[C@@H](O)CS[C@H]12 to produce O=C1CS[C@@H]2[C@H](NC(=O)Cc3ccccc3)C(=O)N2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.