Eicosenoic acid is a monounsaturated long chain fatty with 20-carbon backbone and sole double bond originating from 5th, 6th, 7th, 9th, 11th 12th or 15th positions from the methyl end. 11Z-Eicosenoic acid also called gondoic acid belongs to the member of class of compounds known as long chain fatty acids. Long chain fatty acids are fatty acids having aliphatic tail containing 13 and 21 carbon atoms. It is insoluble in water and a weakly acidic compound. It is a monounsaturated omega-9 fatty acid found in various nuts and plant oils.
This acid is formed by elongation of oleic acid and converted to docosenoic acid and nervonic acid. It is present in small amounts in plants and animals and in some marine fish, it is a major fatty acids. It is found in the membrane of red blood cells and concentration is higher in children with autism which makes it an essential biomarker. It is present in bone marrow aspirates and phospholipids.
Food Sources of Eicosenoic acid
| Food name | Weight (g) | Eicosenoic acid (mg) |
| Herring fish | 140 | 5.107 |
| Eel fish | 85 | 2.550 |
| Macadamia nuts | 132 | 2.541 |
| Sablefish | 85 | 1.208 |
| Salmon | 85 | 1.163 |
| Pine nuts | 135 | 1.081 |
| Peanuts | 146 | 0.915 |
| Coleslaw | 120 | 0.878 |
| Mustard oil | 14 | 0.867 |
| Kielbasa | 370 | 0.825 |
| Beechnuts | 28.35 | 0.782 |
| Bacon | 85 | 0.643 |
| Winged beans | 182 | 0.551 |
| Lupins | 180 | 0.459 |
| Margarine | 232 | 0.422 |
| Black walnuts | 125 | 0.340 |
| Swordfish | 85 | 0.322 |
| Pecans | 110 | 0.292 |
| Peanut spread | 31 | 0.286 |
| Sausage | 101 | 0.285 |
References:
http://www.hmdb.ca/metabolites/HMDB0002231
https://www.matreya.com/Products/Eicosenoic-acid-(icisi-11)__1032.aspx