Using O=C(OCc1ccccc1)[C@H](Cc1ccccc1)NC(=O)N1CCOCC1 to produce O=C(O)[C@H](Cc1ccccc1)NC(=O)N1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.