Sterol composition of the Black Sea Hydrozoan, Obelia longissima (Pallas 1766)

被引：11
作者：
De Rosa, S
Milone, A
Popov, S
Andreev, S
机构：
[1] CNR, Ist Chim Mol Interesse Biol, I-80072 Arco, Italy
[2] Bulgarian Acad Sci, Inst Organ Chem, Ctr Phytochem, BU-1113 Sofia, Bulgaria
[3] Bulgarian Acad Sci, Natl Museum Nat Hist, Sofia 1000, Bulgaria
来源：
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY | 1999年 / 123卷 / 02期
关键词：
Black Sea; coprostanols; GC MS; hydrozoa; 4-methyl sterols; Obelia longissima; stereochemistry; sterols;
D O I：
10.1016/S0305-0491(99)00065-6
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
This is the first investigation on the steroids of the hydrozoan genus Obelia. Thirty known sterols were identified, 20 of them were 4-desmethyl sterols, four coprostanols, and six I-methyl sterols. For two other sterols that appear to be new sterols, tentative structures 13d and 14b are proposed on the basis of the mass spectral fragmentation. Contrary to other Hydrozoans, Obelia longissima contains a very complex sterol mixture, cholesterol not being the main sterol. The main sterol appears to be the (22Z)-isomer of brassicasterol 16a (probably a mixture of two C-24 epimers). The only other (22Z)-sterol seems to be 17a. Sitosterol appears to be a 24 beta isomer (clionasterol). Sterol esters possess a sterol composition different from that of the free sterols. (C) 1999 Elsevier Science Inc. All rights reserved.
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页码：229 / 233
页数：5
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