title: [Studies on the chemical constituents of the root tube from Pteroxygonum giraldii].
abstract: OBJECTIVE
  To study the chemical constituents of the root tube from Pteroxygonum giraldii.
  
  
  METHODS
  Column chromatography and spectral analysis were used to isolate and identify the constituents.
  
  
  RESULTS
  Ten compounds were isolated and identified as beta-sitosterol (I), beta-sitosterol glucoside (II), 4', 5,5', 7-tetrahydroxy-3'-methoxy-3'-O-alpha-L-arabinopyranosyl flavone (III), gallic acid (IV), myricetin (V), annulatin (VI), 5,5', 7-trihydroxy-2',3-dimethoxy-4'-O-beta-D-glucopyranosyl flavone (VII), 2', 5,5',7-tetrahydroxy -3-methoxy-4'-O-beta-D-glucopyranoside flavone (VIII), myricetin-3-O-alpha-L-rhamnopyranoside (IX) and myricetin-3,4'-dimethyl ether( X).
  
  
  CONCLUSIONS
  Compounds I, II, V, VIII and X are isolated from Pteroxygonum giraldii for the first time.
authors: Ruixin Pharmaceutical Co Ltd, Xi'an Jiaotong University, Xi'an 710061, China. Chengxinping.08@mail.xjtu.edu.cn
authors: Xin-Ping
authors: XP
authors: Cheng
authors: Sheng
authors: S
authors: Chen
authors: Di
authors: D
authors: Tian
authors: Lu
authors: L
authors: Ren
authors: Fang
authors: F
authors: Dou
authors: Jun-Xian
authors: JX
authors: Wang
mesh_terms: D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D005707:Gallic Acid / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D019664:Polygonaceae / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D005419:Flavonoids; D012855:Sitosterols; C025473:gamma-sitosterol; D005707:Gallic Acid; C040015:myricetin; C011015:lyoniside