2-Butenoic acid, 2-methyl-, pentyl ester, (2Z)- 2-Butenoic acid, 2-methyl-, pentyl ester, (E)- 7785-63-9 AI3-33334 EINECS 232-083-6 Pentyl 2-methyl-2-butenoate Pentyl 2-methylisocrotonate