4,7-Methanoisobenzofuran-1,3-dione, 4,5,6,7,8,8-hexachloro-3a,4,7,7a-tetrahydro-, polymer with 2,2-bis(hydroxymethyl)-1,3-propanediol and 1,3-isobenzofurandione 67874-94-6 Phthalic anhydride, chlorendic anhydride, pentaerythritol polymer Phthalic anhydride, chlorendic anhydride, pentaerythritol resin