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