Using COCOc1ccc(CCC(=O)c2c(O)cc(OCOC)cc2OCOC)cc1 to produce O=C(CCc1ccc(O)cc1)c1c(O)cc(O)cc1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.