(Z)-2-Methyl-2-butenedioic acid 2-Butenedioic acid, 2-methyl-, (Z)- (9CI) 2-Methyl-2-butenedioic acid 4-02-00-02230 (Beilstein Handbook Reference) 498-23-7 BRN 1722679 Citraconic acid EINECS 207-858-7 Kyselina citrakonova [Czech] METHYLMALEIC ACID Maleic acid, methyl- NSC 32949 cis-Methylbutenedioic acid