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Joh, Yong-Goe,Elenkov, Ivaylo J.,Stefanov, Kamen L.,Popov, Simeon S.,Dobson, Gary,Christie, William W. 동아대학교 생활과학연구소 2003 생활과학연구 논문집 Vol.11 No.-
Unusual fatty acids, with up to 34 carbon atoms and containing one or two bis-methylene-interrupted double-bond systems, have been identified in the sponge Haliclona cinerea from the Black Sea. These include the dienes-5, 9-16:2, 7, 11-18:1, 9, 13-20:2, 13, 17-24:2, 15, 19-26:2, 17, 21-28:2, 19, 23-30:2 and 21, 25-32:2; trienes- 5, 9, 23-30:3, 5, 9, 24-31:3, 5, 9, 23, 27-34:4. In addition, 5, 9, 13-eicosatrienoic acid was present. Many of these do not appear to have been described before, and only 5, 9-16:2 and 5, 9, 23-30:3 are found often in sponges. They were identified by using silver-ion high-performance liquid chromatography to simplify the complex mixture of fatty acids of subsequent analysis by gas chromatography-mass spectrometry as pico-linyl ester derivatives. Deuteration with Wilkinson's catalyst in homogeneous solution confirmed the structures. We speculate that the di- and tetraenoic fatty acids arise by chain elongation of 5, 9-hexadecadienoic acid, also a major component of the lipids, followed by further insertion of double bonds in the 5 and 9 positions. The trienes may be formed from 9-hexadecenoic acid by similar mechanisms.