[Studies on flavonoids of Oxytropis falcata].
OBJECTIVE
To investigate the flavonoids of Oxytropisfalcata.


METHODS
Compounds were isolated by column chromatography using silica gel, Sephadex LH -20 and ODS as the adsorbents. Their structures were elucidated by NMR and MS spectroscopic data.


RESULTS
Eight compounds were isolated and elucidated as 2', 4'-dihydroxy-4-methoxy chalcone (1), 2', 4'-dihydroxy chalcone (2), 5,7-dihydroxy-4'-methoxy flavonol (3), 7-hydroxy-4'-methoxy flavanones (4), 3', 7-dihydroxy-2',4'-dimethoxy isoflavan (5), 2'-hydroxy-4'-methoxy chalcone (6), 2'-methoxy-4'-hydroxy chalcone (7), 2',4'-dihydroxy dihydrochalcone (8).


CONCLUSIONS
All compounds were obtained from O. falcata for the first time.
Lu
Fang
F
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Xu
Xiao-Jie
XJ
D047188:Chalcones / Q000737:chemistry / Q000302:isolation & purification; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D033021:Oxytropis / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry
D047188:Chalcones; D005419:Flavonoids; C059354:2',4'-dihydroxychalcone; C031742:2'-hydroxy-4-methoxychalcone