Using CC(C)(C)C(=O)C[C@@H](Cc1ccccc1)C(=O)O, COC(=O)[C@@H](N)Cc1c[nH]cn1 to produce COC(=O)[C@H](Cc1c[nH]cn1)NC(=O)[C@@H](CC(=O)C(C)(C)C)Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.