Using O=C(O)C[C@@H]1Cc2c([nH]c3ccccc23)CN1C(=O)OCc1ccccc1 to produce O=C(O)C[C@@H]1Cc2c([nH]c3ccccc23)CN1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.