Occurrence of 5,9,19‐octacosatrienoic, 5,9‐hexacosadienoic and 17‐hexacosenoic acids in the marine spongeXestospongia halichondroides

Abstract
The marine spongeXestospongia halichondroides contains 13% 28∶3Δ5,9,19, 27% 26∶2Δ5,9, and 21% 26∶1Δ17 in its total fatty acids. Thecis‐5,cis‐9,cis‐19‐octacosatrienoic acid structure is unknown in other living organisms.
Keywords