Using COCCOCCOc1ccc(-n2ccc(C(=O)OC)n2)c(O)c1 to produce COCCOCCOc1ccc(-n2ccc(C(=O)O)n2)c(O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.