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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