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