2-Butenedioic acid (2Z)-, monomethyl ester, polymer with ethenylbenzene, 2,5-furandione and (2Z)-2-methylpropyl hydrogen 2-butenedioate, ammonium salt 2-Butenedioic acid (Z)-, monomethyl ester, polymer with ethenylbenzene, 2,5-furandione and (Z)-2-methylpropyl hydrogen 2-butenedioate, ammonium salt 93966-93-9