Using COC(=O)[C@H](Cc1c[nH]c2ccccc12)N[C@H](C)[C@H](NC(c1ccccc1)(c1ccccc1)c1ccccc1)C(=O)OC to produce C[C@@H](N[C@@H](Cc1c[nH]c2ccccc12)C(=O)O)[C@H](N)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.