Using O=C1Nc2ccccc2SC[C@@H]1N1C(=O)c2ccccc2C1=O, CC(C)(C)OC(=O)CCl to produce CC(C)(C)OC(=O)CN1C(=O)[C@@H](N2C(=O)c3ccccc3C2=O)CSc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.