Using CC(C)(C)OC(=O)NC(C)(C)C(=O)O, CCOC(=O)[C@@H](N)CSCc1ccccc1 to produce CCOC(=O)[C@H](CSCc1ccccc1)NC(=O)C(C)(C)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.