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Studies on the constituents of marine opisthobranchia, III. Isolation and structure of two 5,8α-epidioxysterols and a cholesteryl ester mixture from the albumen gland ofAplysia juliana

✍ Scribed by Miyamoto, Tomofumi ;Honda, Masanori ;Sugiyama, Shigeo ;Higuchi, Ryuichi ;Komori, Tetsuya

Publisher: John Wiley and Sons
Year: 1988
Tongue: English
Weight: 429 KB
Volume: 1988
Category: Article
ISSN: 0947-3440
DOI: 10.1002/jlac.198819880616

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✦ Synopsis

Chromatography over silica gel (164 g ) (CHC1 /methanol, 4 : l to 1:4)

From the albumen glands of the sea hare Aplyssia juliuna. collected in Kumamoto Prefccturc, a mixture of cholesteryl esters (1) and two 5,8u-epidioxysterols 5 and 8 have bccn isolatcd. Acid-catalyzed methanolysis of 1 aflordcd four methyl esters of fatty acids [palmitate (major component). stearate, margarate, and an isomer of margarate] and cholesterol. 5 and 8 were identified by spectroscopic and synthetical evidence to be 5,8~-epidioxy-Sa-cholest-6-en-3P-01 and 5,8u-cpidioxy-Scr-cholesta-6,9( 1 1 )-dicn-3P-ol, respectively.

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