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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 of Aplysia juliana
Author(s) -
Miyamoto Tomofumi,
Honda Masanori,
Sugiyama Shigeo,
Higuchi Ryuichi,
Komori Tetsuya
Publication year - 1988
Publication title -
liebigs annalen der chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 0170-2041
DOI - 10.1002/jlac.198819880616
Subject(s) - opisthobranchia , chemistry , aplysia , organic chemistry , chromatography , gastropoda , biology , ecology , evolutionary biology
From the albumen glands of the sea hare Aplysia juliana , collected in Kumamoto Prefecture, a mixture of cholesteryl esters ( 1 ) and two 5,8α‐epidioxysterols 5 and 8 have been isolated. Acid‐catalyzed methanolysis of 1 afforded 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 5,8α‐epidioxy‐5α‐cholest‐6‐en‐3β‐ol and 5,8α‐epidioxy‐5α‐cholesta‐6,9(11)‐dien‐3β‐ol, respectively.