title: [Study on TLC identification of Dida commonly used in Tibetan medicine from different species].
abstract: OBJECTIVE
  To establish a method of TLC identification for Dida commonly used in Tibetan medicine from different species.
  
  
  METHODS
  With silica gel G as the stationary phase, and chloroform-methanol (40: 1) as mobile phase, oleanolic acid from different species of Dida was separated and identified.
  
  
  RESULTS
  Oleanolic acid was detected in 70 kinds of Dida derived from the Gentianaceae Swertia, Halenia, Gentianopsis, Lomatogonium, and Saxifragaceae saxifrage, except for the saxifrage, there are some differences among different genera or subjection.
  
  
  CONCLUSIONS
  This TLC method can be used for identification of oleanolic acid in Dida from different species except saxifrage.
authors.affiliation: Chongqing Academy of Chinese Materia Medica, Chongqing 400065, China. yangychem@126.com
authors.forename: Yong
authors.initials: Y
authors.lastname: Yang
authors.forename: Guo-Yue
authors.initials: GY
authors.lastname: Zhong
authors.forename: Xiao-Yun
authors.initials: XY
authors.lastname: Wu
authors.forename: Wei-Zao
authors.initials: WZ
authors.lastname: Luo
authors.forename: Dan-Dan
authors.initials: DD
authors.lastname: Gu
mesh_terms: D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D038861:Medicine, Tibetan Traditional / Q000379:methods*; D009828:Oleanolic Acid / Q000032:analysis / Q000737:chemistry; D013045:Species Specificity
chemical_list: D004365:Drugs, Chinese Herbal; D009828:Oleanolic Acid