Using COc1ccc(C(=O)CC(=O)c2ccc(OC)cc2OC)c(OC)c1 to produce COc1ccc(C(O)CC(O)c2ccc(OC)cc2OC)c(OC)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.