Using COCOc1cc(O)c(C(=O)C=Cc2ccc(OCOC)c(OCOC)c2)c(OCOC)c1 to produce O=C(C=Cc1ccc(O)c(O)c1)c1c(O)cc(O)cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.