[Chemical constituents of Oxytropis falcate].
OBJECTIVE
To study the chemical constituents of Oxytropis falcate.


METHODS
The air-dried whole plants of O. falcate were extracted with EtOH (90%) three times at room temperature. The compounds were isolated by silica-gel, polyamide, C-18 and Sphadex LH-20 columns. The structures were identified based on spectral elucidation.


RESULTS
Fourteen compounds were isolated from O. falcate and identified as, (-)-7-methoxy-dihydroflavone (1), (-)-5-hydroxy-7-methyoxy-dihydroflavone (2), (-)-pinocembrin (3), (-)-7-hydroxy-dihydroflavone (4), 4'-methoxy-2'-hydroxy-chalcone (5), 2', 4'-dihydroxy-dihydrochalcone (6), 2',4'-dihydroxy-chalcone (7), (-)-maackiain (8), tetrahydroflemichapparin-B (9), dalbergin (10), N-benzoyl-2-phenylethylamine (11), n-tetracosanol (12), rhamnocitrin-3-O-beta-neohesperidoside (13), beta-sitosterol (14).


CONCLUSIONS
All the compounds were isolated from O. falcate for the first time.
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China.
Shu-ying
SY
Yao
Yun-bao
YB
Ma
Ya
Y
Tang
Ji-jun
JJ
Chen
Xue-mei
XM
Zhang
D002845:Chromatography; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D000431:Ethanol / Q000737:chemistry; D033021:Oxytropis / Q000737:chemistry*; D013696:Temperature
D004365:Drugs, Chinese Herbal; D000431:Ethanol