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Arachidonic Acid
CAS number: 506-32-1
Arachidonic acid is a long-chain fatty acid that is a C20, polyunsaturated fatty acid having four (Z)-double bonds at positions 5, 8, 11 and 14. It has a role as a human metabolite, an EC 3.1.1.1 (carboxylesterase) inhibitor, a Daphnia galeata metabolite and a mouse metabolite. It is an icosa-5,8,11,14-tetraenoic acid, an omega-6 fatty acid and a long-chain fatty acid. It is a conjugate acid of an arachidonate. It derives from a hydride of a (5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraene.

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A: S. obliquus BGP oils are rich in C18 fatty acids (both saturated and unsaturated), with oleic acid (C18:1n-9) being the dominant monounsaturated fatty acid (28.6–38.7% of total fatty acids), followed by linoleic acid (C18:2n-6, 11.6–14.8%) and α-linolenic acid (C18:3n-3, 9.1–19.1%).
P. cruentum oils are characterized by high levels of long-chain polyunsaturated fatty acids (PUFAs), particularly arachidonic acid (C20:4, 23.6–34.8%) and eicosapentaenoic acid (C20:5, 8.1–11.7%), while C18 fatty acids are present in lower proportions (19.3–28.3%).