title: [Studies on chemical constituents in the root of Desmos grandifolius (I)].
abstract: OBJECTIVE
  To investigate new compounds with anti-tumor activities from the root of Desmos grandifolius of Annonaceae.
  
  
  METHODS
  The chemical constituents were isolated by silica gel column chromatography, and the structures were elucidated by UV, IR, MS, 1H NMR, 13C NMR, H-H COSY and NOESY analysis.
  
  
  RESULTS
  Six compounds have been isolated from the CHCl3 extract of this plant and identified as lawinal(I), isolawinal(II), desmethoxymatteucinol(III), benzoic acid(IV), beta-sitosterol(V) and sitgmasterol (VI).
  
  
  CONCLUSIONS
  All compounds were found from this plant for the first time. Three dihydroflavonoids isolated from this species are characterized by A-ring substitution and no B-ring substitution.
authors.affiliation: Hospital 306 of PLA, Beijing 100101, China.
authors.forename: J H
authors.initials: JH
authors.lastname: Wu
authors.forename: S L
authors.initials: SL
authors.lastname: Mao
authors.forename: S X
authors.initials: SX
authors.lastname: Liao
authors.forename: W H
authors.initials: WH
authors.lastname: Shi
authors.forename: Z W
authors.initials: ZW
authors.lastname: Su
authors.forename: C Q
authors.initials: CQ
authors.lastname: Lan
mesh_terms: D029061:Annonaceae / Q000737:chemistry*; D019817:Benzoic Acid / Q000737:chemistry / Q000302:isolation & purification*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification; D013265:Stigmasterol / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D005419:Flavonoids; D012855:Sitosterols; C061398:lawinal; C025473:gamma-sitosterol; D019817:Benzoic Acid; D013265:Stigmasterol