2-Butenedioic acid, 2-methyl-, (E)- 2-Methylfumaric acid 498-24-8 Butenedioic acid, methyl-, (E)- Fumaric acid, methyl- MESACONIC ACID Mesaconate Methylfumaric acid NSC65438 WLN: QVY1&U1VQ -T trans-1-Propene-1,2-dicarboxylic acid trans-2-Methyl-2-butenedioic acid