Showing papers on "Gentiana published in 1974"

Contribution à la phytochimie du genre Gentiana, VI. Etude des xanthones dans les feuilles de Gentiana bavarica L.

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-primeveroside VI; 1, 8-dihydroxy-3-methoxyxanthone-7-O-acetylrutinoside VII; 7, 8-dihydroxy-3-methoxyxanthone-1-O-primeveroside VIII; 3, 7, 8-trihydroxyxanthone-1-O-primeveroside IX; 3, 7, 8-trihydroxyxanthone-1-O-glucoside X) have been isolated from leaves of Gentiana bavaricaL. by means of column chromatography on polyamid. Among these xanthones, VI, VII, VIII and IX were not encountered before in nature.

Contribution à la phytochimie du genre Gentiana. V. Identification d'un nouveau O‐glucoside de C‐glucoside flavonique dans les feuilles de Gentiana nivalis L

Abstract: A new flavonic heteroside, isoorientin-3′-O-glucoside, has been isolated from leaves of Gentiana nivalisL. by means of column chromatography on polyamide. The determination of the structure is described.