Using C[C@@H](O)[C@H](N)C(=O)N[C@H](Cc1cn(C=O)c2ccccc12)C(=O)N[C@@H](Cc1ccccc1)C(=O)N(C)Cc1ccccc1, CC(=O)OC(C)=O to produce CC(=O)N[C@H](C(=O)N[C@H](Cc1cn(C=O)c2ccccc12)C(=O)N[C@@H](Cc1ccccc1)C(=O)N(C)Cc1ccccc1)[C@@H](C)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.