2-Butenedioic acid (Z)-, polymer with 1,1'-oxybis[ethene], sodium salt 2-Butenedioic acid, (Z)-, polymer with 1,1'-oxybis(ethene), sodium salt 2-Butenedioic acid, (Z)-, polymer with 1,1'-oxybis[ethene], sodium salt NSC332586 Poly(maleic acid-Co-vinyl ether) sodium salt