Flavonol diglycosides from Blackstonia perfoliata.
Two unusual diglycosides, quercetin and kaempferol 3-rhamnosyl(1----2)galactosides and the new isorhamnetin 3-rhamnosyl(1----2)galactoside have been isolated from the aerial parts of Blackstonia perfoliata. Instead of C-glycosylflavones, the occurrence of flavonol glycosides in this species as well as in three other genera of the Gentianaceae: Centaurium, Coutoubea and Eustoma, is in agreement with the grouping of these four genera in the subtribe Chlorae of the Gentianeae.
Laboratoire de Pharmacognosie, UFR de Pharmacie, Université Joseph Fourier-Grenoble I, La Tronche, France.
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Kaouadji
D000215:Acylation; D005419:Flavonoids / Q000302:isolation & purification* / Q000378:metabolism; D044948:Flavonols; D044949:Kaempferols; D009682:Magnetic Resonance Spectroscopy; D010944:Plants / Q000032:analysis* / Q000145:classification; D011794:Quercetin / Q000031:analogs & derivatives / Q000302:isolation & purification*
D005419:Flavonoids; D044948:Flavonols; D044949:Kaempferols; C064705:isorhamnetin 3-O-alpha-rhamnopyranosyl-(1-2)-beta-galactopyranoside; C064704:kaempferol 3-O-alpha-rhamnopyranosyl-(1-2)-beta-galactopyranoside; C064703:quercetin 3-O-alpha-rhamnopyranosyl-(1-2)-beta-galactopyranoside; D011794:Quercetin