2-Butenoic acid, 2-methyl-, 2-methylpropyl ester, (2Z)- 2-Butenoic acid, 2-methyl-, 2-methylpropyl ester, (Z)- 2-Methylpropyl 2-methyl-2-butenoate, (Z)- 7779-81-9 Angelic acid, isobutyl ester Crotonic acid, 2-methyl-, isobutyl ester, (Z)- EINECS 231-941-7 FEMA No. 2180 Isobutyl 2-methylcrotonoate, (Z)- Isobutyl 2-methylisocrotonate Isobutyl angelate Isobutyl cis-2-methyl-2-butenoate