(Z)-9-Octadecen-12-ynoic acid 2277-31-8 9(Z)-Octadec-9-en-12-ynoic acid 9-Octadecen-12-ynoic acid, (9Z)- 9-Octadecen-12-ynoic acid, (Z)- Crepenynic acid cis-9-Octadecen-12-ynoic acid