3-Hydroxy-2,2-dimethylpropanoic acid, 3-hydroxy-2,2-dimethylpropyl ester, hexahydrophthalic anhydride polymer 71839-60-6 Propanoic acid, 3-hydroxy-2,2-dimethyl-, 3-hydroxy-2,2-dimethylpropyl ester, polymer with hexahydro-1,3-isobenzofurandione