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

Tomofumi Miyamoto, Masanori Honda, Shigeo Sugiyama, Ryuichi Higuchi, Tetsuya Komori

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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.

Original languageEnglish
Pages (from-to)589-592
Number of pages4
JournalLiebigs Annalen der Chemie
Issue number6
Publication statusPublished - Jan 1 1988


All Science Journal Classification (ASJC) codes

  • Medicine(all)

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