[Dihydroflavones in Rhododendron concinnum].
OBJECTIVE
To study the chemical constituents of the whole plant of Rhododendron concinnum.


METHODS
The compounds were isolated and purified by chromatography on silica gel and polyamide. Their structures were identified on the basis of spectroscopic data (MS,1H-NMR and 13C-NMR) and chemical evidence.


RESULTS
Five dihydroflavones were isolated and identified as (2R)-farrerol-7-O-glucopyranoside (1), (2R,3R)-(-)-dihydroquercetin-3-O-beta-D-xylopyranoside(2), (2S,3S)-(-)-dihydroquercetin-3-O-beta-D-glucopyranoside(3), eriodictyol-7-O-beta-D-glucopyranoside (4) , (2R, 3R)-(+)-dihydroquercetin (5).


CONCLUSIONS
Except compound 5, others were firstly isolated from the genus Rhododendron.
Zhao
Lei
L
Department of Pharmacy, Gansu College of Traditional Chinese Medicine, Lanzhou 730000, China. luckleizhao@126.com
Wu
Dinghui
D
Yu
Xiaohui
X
Zhang
Yan
Y
D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002867:Chromones / Q000737:chemistry; D006801:Humans; D020128:Inhibitory Concentration 50; D009682:Magnetic Resonance Spectroscopy; D011794:Quercetin / Q000031:analogs & derivatives* / Q000032:analysis / Q000494:pharmacology; D029793:Rhododendron / Q000737:chemistry*; D058428:Silica Gel; D012822:Silicon Dioxide / Q000032:analysis / Q000494:pharmacology
D000972:Antineoplastic Agents, Phytogenic; D002867:Chromones; C015881:farrerol; D058428:Silica Gel; D012822:Silicon Dioxide; D011794:Quercetin; C003377:taxifolin