Using CC(C)C[C@H](NC(=O)OC(C)(C)C)C(=O)O, COC(=O)[C@H](N)Cc1c[nH]c2ccccc12 to produce COC(=O)[C@@H](Cc1c[nH]c2ccccc12)NC(=O)[C@H](CC(C)C)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.