Synonyms: 2-Butenedioic acid (2Z)-, monobutyl ester, sodium salt, polymer with ethenyl acetate;2-Butenedioic acid (2Z)-, 1-butyl ester, sodium salt (1:1), polymer with ethenyl acetate;2-Butenedioic acid (Z)-, monobutyl ester, sodium salt, polymer with ethenyl acetate;65294-10-2