Synonyms: 2-Butenedioic acid (E)-, polymer with 2,2’-oxybis(ethanol) and 3a,4,7,7a-tetrahydro-1,3-isobenzofurandione;2-butenedioic acid (e)-, polymer with 2,2’-oxybis[ethanol] and 3a,4,7,7a-tetrah;2-butenedioic acid (e)-, polymer with2,2’-oxybis[ethanol] and 3a,4,7,7a-tetrahydro-1,3-isobenzofurandione;2-Butenedioic acid(E)-,polymer with 2,2’-oxybis(ethanol)and 3a,4,7,7a-tetrahydro-1,3-isobenzofurandione;ydro-1,3-isobenzofurandione