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Contribution à la phytochimie du genre Gentiana. VII. Etude des composés flavoniques et xanthoniques dans les feuilles de Gentiana vernaL. (1ère communication)

✍ Scribed by Kurt Hostettmann; André Jacot-Guillarmod

Publisher
John Wiley and Sons
Year
1974
Tongue
German
Weight
279 KB
Volume
57
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

A new xanthone‐O‐glycoside, the 1,7‐dihydroxy‐3‐methoxyxanthone‐8‐O‐β‐D‐glucopyranoside (7), has been isolated from the leaves of Gentiana verna L. by means of column chromatography on polyamid. Six known xanthones: 1‐hydroxy‐3,7,8‐trimethoxyxanthone‐1‐O‐primerveroside (2); 1,7,8‐trihydroxy‐3‐methoxyxanthone (3); 7‐hydroxy‐3,8‐dimethoxyxanthone‐1‐O‐primeveroside (4); 7,8‐dihydroxy‐3‐methoxyxanthone‐1‐O‐primeveroside (5); mangiferin 6 and the flavone C‐glycoside isoorientin 8 have also been isolated and identified.

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## Abstract Ten tetraoxygenated xanthones (1‐hydroxy‐3, 7, 8‐trimethoxyxanthone I; 1, 7‐dihydroxy‐3, 8‐dimethoxyxanthone II; 1, 7, 8‐trihydroxy‐3‐methoxyxanthone III; 1, 3, 7, 8‐tetrahydroxyxanthone IV; 3, 7, 8‐trimethoxyxanthone‐1‐O‐primeveroside V; 7‐hydroxy‐3, 8‐dimethoxyxanthone‐1‐O‐primeverosi