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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 3094-3105 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Alkaloids from Rhamnaceae, XIII. Amphibine-B, -C, -D, and -E, four Peptide Alkaloids from Ziziphus amphibia A. ChevalBesides the already described Amphibine-A (1)3), from the bark of Ziziphus amphibia A. Cheval. four new peptide alkaloids, Amphibine-B, -C, -D, and -E, have been isolated, and their structures were elucidated (2-5). These alkaloids belong to the cyclopeptide alkaloids with a fourteen-membered ring system. They contain trans-3-hydroxyproline, an amino acid not yet found in plant peptides, so far known; in addition, they differ from most of the known peptide alkaloids by an additional amino acid in the side chain.
    Notes: Aus dem Rinden-Extrakt von Ziziphus amphibia A. Cheval. wurden neben dem bereits beschriebenen Amphibin-A3) (1) vier weitere Peptidalkaloide, Amphibin-B, -C, -D und -E, isoliert und in der Struktur geklärt (2-5). Diese Alkaloide zählen zu den Cyclopeptidalkaloiden mit 14 gliedrigem Ringsystem; sie enthalten jedoch die in pflanzlichen Peptiden unseres Wissens noch nicht aufgefundene Aminosäure trans-3-Hydroxy-prolin und unterscheiden sich von den meisten bisher bekannten Peptidalkaloiden zudem noch durch die um eine Aminosäure verlängerte Seitenkette.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Alkaloids from Rhamnaceae, XVII1). - Mauritine-C, -D, -E, and -F;New Peptide Alkaloids from Ziziphus mauritiana Lam.**In addition to mauritine-A and -B2), frangufoline3), and the previously known amphibines-B, -d, E4) an -F5), four new alkaloids, mauritine-c, -D, -E, and -F (3-6) were isolated from the mixture of bases from Ziziphus mauritiana Lam. and their structures elucidated. Alle these alkaloids belong to the same structural type with a 14-membered ring system containing trans-3-hydroxyproline, p-hydroxystyrylamine, and α-amino acid.
    Notes: Aus dem Rohbasengemisch von Ziziphus mauritiana Lam. wurden neben Mauritin-A und -B2), Franguforlin3) und den bereits bekannten Amphibinen-B, -D, -E4) und -F5) vier weitere Cyclopeptidalkaloide, die Mauritine-C, -D, -E (3-6) isoliert und deren Struktur aufgeklärt. Alle Alkaloide zählen zum gleichen Strukturtyp mit 14 gliedrigen Ringsystem aus trans-3-Hydrooxyprolin, p-Hydroxystryrylamin und einer α-Aminosäure.
    Additional Material: 1 Tab.
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  • 3
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Alkaloids from Rhamnaceae, XIX1). - Mucronine-E, -F, -G, and -H as well as Abyssenine-A, -B, and -C, New 15-Membered Cyclopeptide Alkaloids**)In addition to the known alkaloids mucronine-A, -B, -C2), and -D3), four new peptide alkaloids, mucronine-E, -F, -G, and -H have been isolated from the crude base of Zizyphus mucronata Willd. and their structures 1-4 elucidated4). - The bark of Zizyphus abyssinica Hochst. ex A. Rich. contains not only the mucronines-A, -B, and -C but also the alkaloids abyssenine-A, -B and -C5) (5-7), which belong to the same structural type as 1-4 and are therefore also described here.
    Notes: Aus dem Rohbasengemisch von Zizyphus mucronata Willd. wurden neben den bereits beschriebenen Mucroninen-A, -B, -C2) und -D3) vier neue Peptidalkaloide Mucronin-E, -F, -G und -H isoliert und deren Strukturen 1-4 ermittelt4). - Die Rinde von Zizyphus abyssinica Hochst. ex A. Rich. enthält neben Mucronin-A, -B und -C noch die Alkaloide Abyssenin-A, -B und -C5) (5-7), die im Strukturtyp den Mucroninen-E bis -H entsprechen und daher mit diesen zusammen beschrieben werden.
    Additional Material: 3 Ill.
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