title: [Structure identification of jujuboside E].
abstract: OBJECTIVE
  To study the chemical constituents of the seeds of Ziziphus jujuba Mill var. spinosa (Bunge) Hu ex. H.F. Chou.
  
  
  METHODS
  To separate the constituents by using various kinds of chromatography methods and identify their structures on the basis of spectral analysis.
  
  
  RESULTS
  Seven compounds were isolated. Their structures were established as jujuboside E (1), jujuboside B (2), jujuboside A (3), betulic acid (4), stearic acid (5), sucrose (6) and inosine (7).
  
  
  CONCLUSIONS
  Compound 1 is a new compound named jujuboside E. Compounds 5, 6, 7 were isolated for the first time from this plant.
authors.affiliation: Division of Natural Medical Chemistry, School of Pharmaceutical Sciences, Peking University, Beijing 100083, China.
authors.forename: Yan-jing
authors.initials: YJ
authors.lastname: Bai
authors.forename: Gong
authors.initials: G
authors.lastname: Cheng
authors.forename: Jing
authors.initials: J
authors.lastname: Tao
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
authors.forename: Yu-ying
authors.initials: YY
authors.lastname: Zhao
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.forename: Li-bin
authors.initials: LB
authors.lastname: Ma
authors.forename: Guang-zhong
authors.initials: GZ
authors.lastname: Tu
mesh_terms: D007288:Inosine / Q000737:chemistry / Q000302:isolation & purification; D008968:Molecular Conformation; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D012639:Seeds / Q000737:chemistry; D013229:Stearic Acids / Q000737:chemistry / Q000302:isolation & purification; D013395:Sucrose / Q000737:chemistry / Q000302:isolation & purification; D031957:Ziziphus / Q000737:chemistry*
chemical_list: D012503:Saponins; D013229:Stearic Acids; C489702:jujuboside E; C031183:stearic acid; C087808:jujuboside A; D013395:Sucrose; D007288:Inosine