2-Pentenoic acid, 4-hydroxy-4-methyl-, methyl ester, (2E)- 2-Pentenoic acid, 4-hydroxy-4-methyl-, methyl ester, (E)- 5739-83-3 DIRECT YELLOW 44 EINECS 227-253-1 Methyl (E)-4-hydroxy-4-methylpent-2-en-1-oate