Using CC(C)C[C@H](NC(=O)OC(C)(C)C)C(=O)O, N[C@H](Cc1c[nH]c2ccccc12)C(=O)OCc1ccccc1 to produce CC(C)C[C@H](NC(=O)OC(C)(C)C)C(=O)N[C@H](Cc1c[nH]c2ccccc12)C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.