Using CC(=O)OC(C)=O, COCOc1ccc(C2Oc3ccc(OCOC)cc3C3CC(O)CC32)cc1 to produce COCOc1ccc(C2Oc3ccc(OCOC)cc3C3CC(OC(C)=O)CC32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.