title: [Studies on constituents of Dendrobium gratiosissimum].
abstract: OBJECTIVE
  To study the chemical constituents of Dendrobium gratiosissimum.
  
  
  METHODS
  The constituents were isolated and purified by silica gel, Sephadex LH-20 colum chromatography, and the structures were identified by physicochemical properties and spectral data.
  
  
  RESULTS
  Nine compounds were obtained as: 3,5,4'-trihydroxybibenzyl (1), 3,4'-dihydroxy-5-methoxybibenzyl (2), 3,4-dihydroxy-4', 5-dimethoxybibenzyl (3), apigenin (4), p-hydroxybenzaldehyde (5), defuscin (6), n-octacostyl ferulate (7), beta-sitosterol (8) and daucosterol (9).
  
  
  CONCLUSIONS
  All these compounds were obtained from this plant for the first time, and compounds 2, 4 and 5 were isolated firstly from this genus.
authors.affiliation: Department of Pharmacognosy, China Pharmaceutical University, Nanjing 210038, China.
authors.forename: Min
authors.initials: M
authors.lastname: Wang
authors.forename: Chao-feng
authors.initials: CF
authors.lastname: Zhang
authors.forename: Zheng-tao
authors.initials: ZT
authors.lastname: Wang
authors.forename: Mian
authors.initials: M
authors.lastname: Zhang
mesh_terms: D047310:Apigenin / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D001547:Benzaldehydes / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D002109:Caffeic Acids / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D031667:Dendrobium / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D001547:Benzaldehydes; D002109:Caffeic Acids; C504154:n-octacostyl ferulate; D047310:Apigenin; C011483:4-hydroxybenzaldehyde