title: [Studies on constitutes from Taraxacum mongolicum].
abstract: OBJECTIVE
  To study the chemical constituents of Taraxacum mongolicum.
  
  
  METHODS
  Repeated column chromatography over silica gel, C-18 and Sephadex LH-20 were used to isolate chemical constitutes and their structures were elucidated by spectroscopic methods MS, 1H-NMR, 13C-NMR including 2D-NMR techniques and by direct comparing spectral data with those reported in literatures.
  
  
  RESULTS
  Eight compounds were identified as artemetin (1), quercetin (2), luteolin (3), luteolin-7-O-beta-D-glucopyranoside (4), caffeic acid (5), esculetin (6), stigmasterol (7), taraxasteryl acetate (8), respectively.
  
  
  CONCLUSIONS
  Compound 1 was obtained from this genus and compound 6, 8 from this species for the first time. Furthermore, the 13 carbon data of compound 6 from the literature were corrected with 2D-NMR techniques in this paper.
authors.affiliation: Zhejiang Chem-Tech Group Co., Ltd., Hangzhou 310023, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Yao
authors.forename: Wen-Yan
authors.initials: WY
authors.lastname: Lin
authors.forename: Chang-Xin
authors.initials: CX
authors.lastname: Zhou
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D002850:Chromatography, Gel; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010946:Plants, Medicinal / Q000737:chemistry*; D013261:Sterols / Q000737:chemistry / Q000302:isolation & purification*; D031205:Taraxacum / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D014468:Umbelliferones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D005419:Flavonoids; D013261:Sterols; D014315:Triterpenes; D014468:Umbelliferones; C092740:taraxasteryl acetate; C054132:artemetin; C007628:esculetin