title: [Studies on chemical constituents of herbs of Oxytropis microphylla].
abstract: OBJECTIVE
  To study the chemical constituents of Oxytropis microphylla.
  
  
  METHODS
  The compounds were isolated and purified by various column chromatographic techniques and their structures were elucidated on the basis of spectral analysis (EI-MS, 1H-NMR, 13C-NMR).
  
  
  RESULTS
  Eight compounds were isolated and identified as kaempferol (1), baicalein (2), 5-hydroxy-7, 8, 4'-trimethoxyflavone (3), stigmasterol (4), stigmast-4-en-3beta-ol (5), beta-sitosterol (6), lupenol (7), dehydrocostus lactone (8).
  
  
  CONCLUSIONS
  All compounds were isolated for the first time from this plant, compounds 2, 3, 5, and 8 were isolated for the first time from this genus.
authors.affiliation: Insititute of Chemical Engineering, Northwest University for Nationalities, Lanzhou 730030, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Peng
authors.forename: Zhongduo
authors.initials: Z
authors.lastname: Yang
mesh_terms: D002851:Chromatography, High Pressure Liquid; D044950:Flavanones / Q000737:chemistry; D005419:Flavonoids / Q000737:chemistry; D044949:Kaempferols / Q000737:chemistry; D007783:Lactones / Q000737:chemistry; D033021:Oxytropis / Q000737:chemistry*; D012717:Sesquiterpenes / Q000737:chemistry; D012855:Sitosterols / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization; D013265:Stigmasterol / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry
chemical_list: D044950:Flavanones; D005419:Flavonoids; D044949:Kaempferols; D007783:Lactones; D012717:Sesquiterpenes; D012855:Sitosterols; D014315:Triterpenes; C083030:dehydrocostus lactone; C006680:baicalein; C025473:gamma-sitosterol; C006552:kaempferol; D013265:Stigmasterol