Using COC(=O)[C@H]1Cc2c([nH]c3ccccc23)[C@H](CO)N1 to produce O=C(O)[C@H]1Cc2c([nH]c3ccccc23)[C@H](CO)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.