Using CCc1cc(-c2cccc(C(=O)OC)n2)ccc1O, O=C([O-])[O-] to produce CCc1cc(-c2cccc(C(=O)OC)n2)ccc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.