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  • 1
    Electronic Resource
    Electronic Resource
    Vier neue Pregnanglycoside aus Gongronema latifolium (Asclepiadaceae) (1993)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1993 (1993), S. 1057-1062 
    Details
    ISSN: 0170-2041
    Keywords: 17β-Marsdenin ; Pregnane derivatives ; Biosides ; Gongronema latifolium ; Asclepiadaceae ; Steroids ; Saccharides ; Carbohydrates ; Glycosides ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Four New Pregnane Glycosides from Gongronema latifolium (Asclepiadaceae)Four so far unknown pregnane biosides have been isolated from the chloroform extract of the leaves of Gongronema latifolium Benth. et Hook. (Asclepiadaceae). From one- and twodimensional NMR experiments (NOE difference spectroscopy, ROESY, H,H-COSY, C,H-COSY, HMBC) their structures have been established as 3-O-[6-deoxy-3-O-methyl-β-D-allopyranosyl-(1→4)-β-D-canaropyranosyl]-17β-marsdenin (1a), 3-O-[6-deoxy-3-O-methyl-β-D-allopyranosyl-(1→4)-β-D-oleandropyranosyl]-17β-marsdenin (1b), 12-O-acetyl-3-O-[6-deoxy-3-O-methyl-β-D-allopyranosyl-(1→4)-β-D-canaropyranosyl]-17β-marsdenin (1c) and 11-O-acetyl-3-O-[6-deoxy-3-O-methyl-β-D-allopyranosyl-(1→4)-β-D-canaropyranosyl]-17β-marsdenin (1d).
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.1993199301170
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  • 2
    Electronic Resource
    Electronic Resource
    Alkaloide aus Veratrum patulum, I. Isolierung und Strukturaufklärung neuer SteroidalkaloidglycosideHerrn Professor Dr. F. Zymalkowski zum 80. Geburtstag gewidmet. (1993)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1993 (1993), S. 281-285 
    Details
    ISSN: 0170-2041
    Keywords: Veratrum patulum ; Steroids ; Glycosides ; Liliaceae ; Alkaloids ; Carbohydrates ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Alkaloids from Veratrum patulum, I. - Isolation and Structure Elucidation of New Steroid Alkaloid GlycosidesHerrn Professor Dr. F. Zymalkowski zum 80. Geburtstag gewidmet.Beside the known veratrosine (1), two new steroid alkaloid glucosides, 23-O-β-D-glucopyranosyl-20-isoveratramine (2) and (22S,23R,25S)-23-O-β-D-glucopyranosyl-5,11,13-veratratrienine-3β,23-diol (3), were isolated from the roots of Veratrum patulum Loes. fil. (Liliaceae) and characterized by spectroscopic methods.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199319930148
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