[Dihydroflavonol glycosides and flavan-3-ols from Bauhinia aurea].
OBJECTIVE
To study the chemical constituents of Bauhinia aurea.


METHODS
The compounds were isolated by column chromatography over silica gel, reversed-phase RP-18, and Sephadex LH -20. MS and NMR spectroscopic methods were used to determine structures of purified compounds.


RESULTS
Eight compounds were isolated from the ethyl acetate soluble fraction of the ethanolic extract and their structures were elucidated as isoengeletin (1), astilbin (2), neoastilbin (3), isoastilbin (4), neoisoastilbin (5), (+)-catechin (6), (-)-epicatechin (7) and (-)-epicatechin 3-O-gallate (8).


CONCLUSIONS
Five compounds were isolated from this genus for the first time except for 2, 6 and 8.
Shang
Xiao-Ya
XY
Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100050, China.
Li
Shuai
S
Wang
Su-Juan
SJ
Yang
Yong-Chun
YC
Shi
Jian-Gong
JG
D036481:Bauhinia / Q000737:chemistry*; D002392:Catechin / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification*; D002850:Chromatography, Gel; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D044948:Flavonols / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D044948:Flavonols; C520363:neoastilbin; C099069:astilbin; D002392:Catechin; C062669:epicatechin gallate