Premium
Sterols of the sponge Tethya amamensis : Occurrence of (24E)‐24‐ethylidenecholesta‐5,7‐dienol, (24E)‐24‐propylidenecholesta‐5,7‐dienol, and (24Z)‐24‐propylidenecholesta‐5,7‐dienol
Author(s) -
Teshima ShinIchi,
Kanazawa Akio,
Yamada Ichimaro,
Tanaka Yoshito
Publication year - 1983
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02534547
Subject(s) - biology , sterol , botany , sponge , cholesterol , biochemistry
The sponge Tethya amamensis , collected from Kagoshima Bay, Japan, contained at least 24 sterols, including Δ 5 ‐sterols (82.2% of total sterols) and Δ 5, 7 ‐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 T. amamensis also contained small amounts of 24‐norcholesta‐5,7,22‐trienol and (24Z)‐24‐ethylidenecholesta‐5,7‐dienol.