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  • 1
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Biologically Active Glycosides from Asteroidea, I1).  -  Structures of a New Cerebroside Mixture and of Two Nucleosides from the Starfish Acanthaster planciFrom the starfish Acanthaster planci the new cerebroside mixture 1 (11.7 mg per individual of average weight 150 g) and the two nucleosides 2 (2.4 mg per individual) and 3 (1.1 mg per individual) have been isolated. Acid catalyzed methanolysis of 1 afforded the methyl esters of four α-hydroxy fatty acids [tetracosanoate (major component), tricosanoate, docosanoate, and nonadecanoate], two 2-amino-1,3,4-alkanetriols [heptadecanetriol (major component) and octadecanetriol], and methyl glucoside. The nucleosides 2 and 3 have been identified as thymine deoxyribonucleoside and uracil deoxyribonucleoside, respectively. Apart from conventional analytical methods, field desorption mass spectrometry (FD-MS) was successfully used for the first time for the determination and confirmation of the structures of naturally occurring glycolipids and nucleosides.
    Notes: Aus dem Seestern Acanthaster planci wurden das neue Cerebrosidgemisch 1 (11.7 mg pro Individuum bei einem mittleren Körpergewicht von 150 g) sowie die beiden Nucleoside 2 (2.4 mg pro Individuum) und 3 (1.1 mg pro Individuum) isoliert. Die säurekatalysierte Methanolyse von 1 ergab die Methylester von vier α-Hydroxyfettsäuren [Tetracosanoat (Hauptbestandteil), Tricosanoat, Docosanoat und Nonadecanoat] zwei 2-Amino-1,3,4-alkantriole [Heptadecantriol (Hauptbestandteil) und Octadecantriol] sowie Methylglucosid. Die Nucleoside 2 und 3 wurden als Thymindesoxyribonucleosid bzw. Uracildesoxyribonucleosid identifiziert. Neben den konventionellen analytischen Methoden wurde erstmals die Felddesorption-Massenspektrometrie (FD-MS) für die Bestimmung und Absicherung der Struktur natürlich vorkommender Glykolipide und Nucleoside erfolgreich eingesetzt.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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