Using CCOC(=O)[C@H](CCc1ccccc1)Oc1ccc(-c2ccco2)cc1 to produce O=C(O)[C@H](CCc1ccccc1)Oc1ccc(-c2ccco2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.