204057-42-1 37999-57-8 4,7-Methanoisobenzofuran-1,3-dione, 4,5,6,7,8,8-hexachloro-3a,4,7,7a-tetrahydro-, polymer with 1,2-ethanediol, 2,5-furandione and 2,2'-oxybis(ethanol)