Using O=C(O[C@@H](Cc1c[nH]cn1)C(=O)OCc1ccccc1)C(Cc1ccccc1)Cc1ccccc1 to produce O=C(O[C@@H](Cc1c[nH]cn1)C(=O)O)C(Cc1ccccc1)Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.