Two flavonol glycosides from seeds of Camellia sinensis.
Two novel flavonol triglycosides, camelliaside A and B, have been isolated from seeds of Camellia sinensis. The structures were determined to be kaempferol 3-O-[2-O-beta-D- galactopyranosyl-6-O-alpha-L-rhamnopyranosyl]-beta-D-glucopyranoside and kaempferol 3-O-[2-O-beta- D-xylopyranosyl-6-O-alpha-L-rhamnopyranosyl]-beta-D-glucopyranoside on the basis of spectroscopic, chemical and enzymatic studies. These types of interglycosidic linkages, Gal(1----2)[Rha(1----6)]Glc and Xyl(1----2)[Rha(1----6)]Glc, have not been reported previously in flavone and flavonol glycosides.
Faculty of Pharmaceutical Sciences, Chiba University, Japan.
T
T
Sekine
J
J
Arita
A
A
Yamaguchi
K
K
Saito
S
S
Okonogi
N
N
Morisaki
S
S
Iwasaki
I
I
Murakoshi
D002240:Carbohydrate Sequence; D005419:Flavonoids; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D006868:Hydrolysis; D044949:Kaempferols; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D012639:Seeds / Q000737:chemistry; D013662:Tea / Q000737:chemistry*
D005419:Flavonoids; D006027:Glycosides; D044949:Kaempferols; D013662:Tea; C070688:camelliaside B; C070687:camelliaside A; D011794:Quercetin