Using CC(C)(C)OC(=O)[C@H](CN)NS(=O)(=O)c1ccccc1, O=C(O)CNC(=O)OCc1ccccc1 to produce CC(C)(C)OC(=O)[C@H](CNC(=O)CNC(=O)OCc1ccccc1)NS(=O)(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.