Flavonol glycosides from Monnina sylvatica.
A new kaempferol triglycoside and three known kaempferol glycosides, among them two apiosides, have been isolated from the aerial parts of Monnina sylvatica. The structures were established on the basis of acid and enzymatic hydrolysis and spectral data (UV, 1H and 13CNMR, NOE difference measurements, D/CI and FAB-MS) of the isolates and of some derivatives. The triglycoside kaempferol 3-O-beta-D-glucosyl-(1----2)-O-[alpha-L-rhamnosyl(1----6)]-beta-D- galactoside is a new natural product. The configuration of the apiosyl moiety in kaempferol 3-O-beta-D-apiosyl(1----2)-beta-D-galactoside and kaempferol 3-O-beta-D-apiosyl(1----2)-O-[alpha-L-rhamnosyl(1----6)]- beta-D-galactoside was established through NOE difference measurements on the peracetate.
Institut de Pharmacognosie et Phytochimie, Ecole de Pharmacie, Université de Lausanne, Switzerland.
A
A
Bashir
M
M
Hamburger
M P
MP
Gupta
P N
PN
Solis
K
K
Hostettmann
D002240:Carbohydrate Sequence; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D044949:Kaempferols; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D010944:Plants / Q000737:chemistry; D011794:Quercetin / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification
D005419:Flavonoids; D044949:Kaempferols; C006552:kaempferol; D011794:Quercetin