Also Called: 1,3-Isobenzofurandione, hexahydro-, polymer with α,α',α''- 1,2,3-propanetriyltris[ω-hydroxypoly[oxy(methyl -1,2-ethanediyl)]];1,3-Isobenzofurandione, hexahydro-, polymer with α,α',α''-1,2,3-propanetriyltris[ω-hydroxypoly[oxy(methyl-1,2-ethanediyl)]];1,3-Isobenzofurandione, hexahydro-, polymer with .alpha.,.alpha.',.alpha.''-1,2,3-propanetriyltris[.omega.-hydroxypoly[oxy(methyl-1,2-ethanediyl)]]