Using COCOc1ccc2c(=O)c(OCOC)c(-c3ccc(OCc4ccccc4)c(OCOC)c3)oc2c1 to produce COCOc1ccc2c(=O)c(OCOC)c(-c3ccc(O)c(OCOC)c3)oc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.