title: [Studies on chemical constituents from herbs of Taraxacum mongolicum].
abstract: OBJECTIVE
  To investigate the chemical constituents of the herbs of Taraxacum mongolicum.
  
  
  METHODS
  The chemical constituents were isolated by various column chromatographic methods and their structures elucidated mainly by NMR and MS evidences.
  
  
  RESULTS
  Forty-four components were obtained and identified were as artemetin (1), quercetin (2), quercetin-3', 4', 7-trime-thyl ether (3), luteolin (4), luteolin-7-O-beta-D-glucopyranoside (5), luteolin-7-O-beta-D-galactopyranoside (6), genkwanin (7), isoetin (8), hesperetin (9), genkwanin-4'-O-beta-D-lutinoside (10), hesperidin (11), quercetin-7-O-[beta-D-glucopyranosyl (1-->6) -beta-D-glucopyranoside (12), quercetin-3, 7-O-beta-D-diglucopyranoside (13), isoetin-7-O-beta-D-glucopyranosyl- 2'-O-alpha-L-arabinopyranoside (14), isoetin-7-O-beta-D-glucopyranosyl-2'-O-alpha-D-glucopyranoside (15), isoetin-7- O-beta-D-glucopyranosyl-2'-O-beta-D-xyloypyranoside (16), caffeic acid (17), furulic acid (18), 3-O-caffeoylquinic acid (19), 3, 5-di-O-caffeoylquinic acid (20), 3, 4-di-O-caffeoylquinic acid (21), 4, 5-di-O-caffeoylquinic acid (22), 1-hydroxymethyl-5-hydroxy-phenyl-2-O-beta-D-glucopyranoside (23), p-hydroxybenzoic acid (24), p-coumaric acid (25), 3, 5-dihydroxylbenzoic acid (26), gallic acid (27), gallicin (28), syringic acid (29), 3, 4-dihydroxybenzoic acid (30), caffeic acid ethyl ester (31), esculetin (32), rufescidride (33), mongolicumin A [6, 9, 10-trihydroxy-benzoxanthene-1, 2-dicarboxylic acid] (34), mongolicumin B [1 l-hydroxy-2-oxo-guaia-1 (10), 3, 5-trien-8, 12-lactone] (35), isodonsesquitin A (36), taraxacin (37), sesquiterpene ketolactone (38), taraxasteryl acetate (39), phi-taraxasteryl acetate (40) and lupenol acetate (41), palmitic acid (42), beta-sitosterol (43), and stigmasterol (44).
  
  
  CONCLUSIONS
  Four compounds (14, 15, 34 and 35) were new compounds, compounds 1, 3, 6-13, 20-22, 30 and 31 were isolated from this genus for the first time, while compounds 18, 23-29, 32 and 37-42 were obtained from this species for the first time.
authors: College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.
authors: Shu-Yun
authors: SY
authors: Shi
authors: Chang-Xin
authors: CX
authors: Zhou
authors: Yan
authors: Y
authors: Xu
authors: Qiao-Feng
authors: QF
authors: Tao
authors: Hua
authors: H
authors: Bai
authors: Fu-Sheng
authors: FS
authors: Lu
authors: Wen-Yan
authors: WY
authors: Lin
authors: Hai-Yong
authors: HY
authors: Chen
authors: Wei
authors: W
authors: Zheng
authors: Li-Wei
authors: LW
authors: Wang
authors: Yi-Hang
authors: YH
authors: Wu
authors: Su
authors: S
authors: Zeng
authors: Ke-Xin
authors: KX
authors: Huang
authors: Yu
authors: Y
authors: Zhao
authors: Xiao-Kun
authors: XK
authors: Li
authors: Jia
authors: J
authors: Qu
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D044948:Flavonols / Q000737:chemistry; D013058:Mass Spectrometry; D031205:Taraxacum / Q000737:chemistry*
chemical_list: D004365:Drugs, Chinese Herbal; D044948:Flavonols