Volume 1983, Issue 1 p. 37-55
Article

Biologically active glycosides from asteroidea, III. Steroid oligoglycosides from the starfish Acanthaster planci L., 2. Structures of two newly characterized genuine sapogenins and an oligoglycoside sulfate

Tetsuya Komori

Tetsuya Komori

Faculty of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka, 812, Japan

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Hiroyuki Nanri

Hiroyuki Nanri

Faculty of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka, 812, Japan

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Yoichi Itakura

Yoichi Itakura

Faculty of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka, 812, Japan

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Kenji Sakamoto

Kenji Sakamoto

Faculty of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka, 812, Japan

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Shuzo Taguchi

Shuzo Taguchi

Faculty of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka, 812, Japan

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Ryuichi Higuchi

Ryuichi Higuchi

Faculty of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka, 812, Japan

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Toshio Kawasaki

Toshio Kawasaki

Faculty of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-Ku, Fukuoka, 812, Japan

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Tetsuo Higuchi

Tetsuo Higuchi

Research Laboratory of Jeol Ltd., 1418 Nakagami, Akishima, Tokyo, 196, Japan

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First published: 13. Januar 1983
Citations: 31

Abstract

en

From the whole bodies of Acanthaster planci L. a genuine oligoglycoside which is an unstable type 20-hydroxycholesten-23-one glycoside sulfate has been isolated in large quantities. Apart from the known 3β,6α-dihydroxy-5α-pregn-9(11)-en-20-one (1) two new genuine aglycones were isolated by enzymatic hydrolysis of the crude oligoglycoside fraction for the first time. The structures were identified by chemical and spectroscopic evidence to be 3β,6α,20ζ-trihydroxy-5α-cholest-9(11)en-23-one (2) and 3β,6α,20ξ-trihydroxy-5α-cholesta-9(11),24-dien-23-one (3), respectively. The structure of the newly characterized pentaglycoside sulfate Acanthaglycoside A was then determined to be 3β-sodiosulfonatooxy-6α,20ξ-dihydroxy-23-oxo-5α-cholesta-9(11),24-dien-6α-ylO-β-D-fucopyranosyl-(1→2)-O-β-D-quinovopyranosyl-(1→4)-O-[β-D-quinovopyranosyl-(1→2)]-O-β-D-xylopyranosyl-(1→3)-O-β-D-quinovopyranoside (4). Apart from conventional analytical methods, fast atom bombardment mass spectrometry (FAB-MS) was successfully used for the first time for determination and confirmation of the structure of the natural oligoglycoside sulfate.

Abstract

de

Biologisch Aktive Glycoside aus Asteroidea, III1,-Steroid-Oligoglycoside aus dem Seestern Acanthaster planci L., 2 -Strukturen von zwei neu charakterisierten genuinen Sapogeninen und einem Oligoglycosid-sulfat

Aus Seesternen (Acanthaster planci L.) wurde ein labiles Glycosid-Sulfat vom Typ 20-Hydroxycholesten-23-on in großen Mengen zur Strukturaufklärung isoliert. Abgesehen von dem bekannten 3β,6α-Dihydroxy-5α-pregn-9(11)-en-20-one (1) wurden erstmalig zwei neue genuine Aglyca bei der enzymatischen Hydrolyse der rohen Oligoglycosidfraktion isoliert. Auf Grund der chemischen und spektrometrischen Untersuchungen ließen sich die Strukturen als 3β,6α,20ξ-Trihydroxy-5α-cholest-9(11)-en-23-one (2) und 3β,6α,20ξ-Trihydroxy-5α-cholesta-9(11),24-dien-23-one (3) festlegen. Die Struktur eines als Acanthaglycosid A benannten neuen Pentaglycosid-Sulfats wurde als 3β-Natriosulfonatooxy-6α,20ξ-dihydroxy-23-oxo-5α-cholesta-9(11),24-dien-6α-yl-O-β-D-fucopyranosyl-(1→2)-O-β-D-quinovopyranosyl-(1→4)-O-[β-D-quinovopyranos-yl-(1→2)]-O-β-D-xylopyranosyl-(1→3)-O-β-D-quinovopyranosid identifiziert. Neben den konventionellen analytischen Methoden wurde erstmals die Fast-atom-bombardment-Massenspektrometrie (FAB-MS) für die Bestimmung und Absicherung der Struktur der natürlich vorkommenden Oligoglycosid-Sulfate benutzt