Using CCOC(=O)[C@@H](Cc1ccccc1)C[C@H](Cc1ccccc1)C(=O)NCCC(=O)O, OCc1cccnc1 to produce CCOC(=O)[C@@H](Cc1ccccc1)C[C@H](Cc1ccccc1)C(=O)NCCC(=O)OCc1cccnc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.