title: [Studies on triterpenes chemical constituents in rhizome of Alisma gramineum].
abstract: OBJECTIVE
  To investigate the triterpenoids chemical constituents in rhizome of Alisma gramineum.
  
  
  METHODS
  Silicon gel chromatography and HPLC techniques were employed for isolation and purification of the constituents, and the structures were elucidated by various spectral analyses such as NMR, MS and IR.
  
  
  RESULTS
  5 protostane-type tetracyclic triterpenoids were isolated and identified as 16,23-oxidoalisol B(1), 11-deoxyalisol C(2), alisol F(3), 16beta-methoxyalisol B acetate (4), 16beta-hydroxyalisol B acetate (5).
  
  
  CONCLUSIONS
  All of these compounds were found from A. gramineum for the first time.
authors.affiliation: Zhejiang pharmaceatical College, Ningbo 315100, China.
authors.forename: Lian-qun
authors.initials: LQ
authors.lastname: Wo
authors.forename: Guang-ming
authors.initials: GM
authors.lastname: Luo
authors.forename: Bao-xiu
authors.initials: BX
authors.lastname: Wang
authors.forename: Wei-feng
authors.initials: WF
authors.lastname: Zhu
mesh_terms: D034902:Alisma / Q000737:chemistry*; D002778:Cholestanones / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C516684:16,23-oxidoalisol B; D002778:Cholestanones; D014315:Triterpenes; C516685:alisol F