title: [Studies on chemical constituents in roots of Helicteres angustifolia].
abstract: OBJECTIVE
  To study the chemical constituents of the roots of Helicteres angustifolia.
  
  
  METHODS
  The compounds were isolated and purified by column chromatographic methods on silica gel, Sephadex LH-20, ODS and preparative HPLC. Their structures were elucidated on the basis of physicochemical properties and spectral data.
  
  
  RESULTS
  Fourteen compounds were isolated from this plant. Their structures were identified as methyl helicterate(1),3-acetoxybetulin(2),3beta-acetoxy-27-(p-hydroxyl)benzoyloxylup-20(29)-en-28-oic acid methyl ester(3),3beta-acetoxy-27-benzoyloxylup-20(29)-en-28-oic acid(4),3beta-acetoxybetulinic acid(5),pyracrenic acid(6),cucurbitacin D(7),cucurbitacin B(8),isocucurbitacin D(9),3beta-acetoxy-27-[(4-hydroxybenzoyl)oxy]olean-12-en-28-oic acid methyl ester (10),beta-sitosterol(11),2alpha,7beta,20alpha-trihydroxy-3beta,21-dimethoxy-5-pregnene(12), hexadecanoic acid(13), and daucosterol(14), respectively.
  
  
  CONCLUSIONS
  Compounds 5,8,9,13, 14 were isolated from this plant for the first time.
authors.affiliation: Department of Phytochemistry, China Pharmaceutical University, Nanjing 210009, China.
authors.forename: Yingrou
authors.initials: Y
authors.lastname: Wei
authors.forename: Guocai
authors.initials: G
authors.lastname: Wang
authors.forename: Xiaoqi
authors.initials: X
authors.lastname: Zhang
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Wencai
authors.initials: W
authors.lastname: Ye
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D019660:Malvaceae / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry
chemical_list: D012855:Sitosterols; D014315:Triterpenes; C041246:cucurbitacin B; C038105:cucurbitacin D; C025473:gamma-sitosterol; C034109:pyracrenic acid