Using COC(=O)[C@@H](Cc1c[nH]c2ccccc12)NC(=O)[C@H](Cc1c[nH]cn1)NC(=O)OCc1ccccc1 to produce O=C(N[C@@H](Cc1c[nH]cn1)C(=O)N[C@H](Cc1c[nH]c2ccccc12)C(=O)O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.