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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: Decathieleanolide, a Dimeric Guaianolide from Decachaeta thieleanaIn addition to the main constituent, the guaianolide thieleanin (1), the aerial parts of Decachaeta thieleana afforded the four further guaianolides 2-5 and an unusual dimeric sesquiterpene lactone named decathieleanolide (10). The structures were elucidated by spectroscopic methods. The assignment of the signals of the very complex 1H NMR spectrum of 10 was possible by using double resonance experiments and 2D-J spectroscopy. The biogenesis is discussed briefly.
    Notes: Neben dem Hauptinhaltsstoff, dem Guajanolid Thieleanin (1), ergeben die oberirdischen Teile von Decachaeta theileana die vier weiteren Guajanolide 2-5 und ein ungewöhnliches dimeres Sesquiterpenlacton, das Decathieleanolid (10) genannt wird. Die Strukturen werden durch spektroskopische Methoden geklärt. Die Zuordnung der Signale des sehr komplexen 1H-NMR-Spektrums von 10 wird durch Doppelresonanzexperimente und 2D-J-Spektroskopie ermöglicht. Die Biogenese wird kurz diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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