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Sterols of the sponge<i>Tethya amamensis</i>: Occurrence of (24E)‐24‐ethylidenecholesta‐5,7‐dienol, (24E)‐24‐propylidenecholesta‐5,7‐dienol, and (24Z)‐24‐propylidenecholesta‐5,7‐dienol
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- Shin‐Ichi Teshima
- Faculty of Fisheries University of Kagoshima 4‐50‐20 Shimoarata Kagoshima 890 Japan
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- Akio Kanazawa
- Faculty of Fisheries University of Kagoshima 4‐50‐20 Shimoarata Kagoshima 890 Japan
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- Ichimaro Yamada
- Faculty of Fisheries University of Kagoshima 4‐50‐20 Shimoarata Kagoshima 890 Japan
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- Yoshito Tanaka
- Faculty of Fisheries University of Kagoshima 4‐50‐20 Shimoarata Kagoshima 890 Japan
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Description
<jats:title>Abstract</jats:title><jats:p>The sponge<jats:italic>Tethya amamensis</jats:italic>, collected from Kagoshima Bay, Japan, contained at least 24 sterols, including Δ<jats:sup>5</jats:sup>‐sterols (82.2% of total sterols) and Δ<jats:sup>5, 7</jats:sup>‐sterols (17.8%). The predominant sterols were cholesterol (29.0%), cholesta‐5,22‐dienol (13.8%), 24‐methylcholesta‐5,22‐dienol (10.9%), 24‐methylenecholesterol (8.3%), 24‐methylcholesta‐5,7,22‐trienol (6.8%), 24‐ethylcholest‐5‐enol (6.1%), and isofucosterol *4.1%). Combined gas liquid chromatography‐mass spectrometry suggested the presence of 3 uncommon sterols, (24E)‐24‐ethylidenecholesta‐5,7‐dienol, (24E)‐24‐propylidenecholesta‐5,7‐dienol, and (24Z)‐24‐propylidenecholesta‐5,7‐dienol as minor components. The sterols of<jats:italic>T. amamensis</jats:italic> also contained small amounts of 24‐norcholesta‐5,7,22‐trienol and (24Z)‐24‐ethylidenecholesta‐5,7‐dienol.</jats:p>
Journal
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- Lipids
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Lipids 18 (3), 193-197, 1983-03
Wiley
