title: [Comparison of chemical compositions between Dendrobium candidum and Dendrobium nobile].
abstract: OBJECTIVE
  To compare the chemical compositions between Dendrobium candidum (D. candidum) and Dendrobium nobile (D. nobile).
  
  
  METHODS
  Relative area and content of every chromatographic peak in the ammonic chloroform extracts of D. candidum were compared with those of D. nobile with high performance liquid chromatography-mass spectrometry.
  
  
  RESULTS
  The relative area of alkaloids accounted for 2.34% and 41.87% in D. candidum and D. nobile, respectively. The relative area of 25 identical compositions took up 97.12% in the total area of D. candidum and 50.09% in that of D. nobile, and contents of 23 composition were higher in D. candidum than those in D. nobile.
  
  
  CONCLUSIONS
  The quantity and contents of alkaloids are remarkably different between D. candidum and D. nobile. However, D. candidum has a higher quality than D. nobile in terms of the same chemical compositions.
authors.affiliation: Biotechnology Research Center, Institute of Medicinal Plant Development, CAMS and PUMC, Beijing 100094, China.
authors.forename: Xiao-Mei
authors.initials: XM
authors.lastname: Chen
authors.forename: Sheng-Yuan
authors.initials: SY
authors.lastname: Xiao
authors.forename: Shun-Xing
authors.initials: SX
authors.lastname: Guo
mesh_terms: D000470:Alkaloids / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D031667:Dendrobium / Q000737:chemistry* / Q000145:classification
chemical_list: D000470:Alkaloids