title: [Triterpenoids from the root bark of Aralia subcapitata].
abstract: OBJECTIVE
  To investigate the chemical constituents of Aralia subcapitata.
  
  
  METHODS
  The methanol extract of A. subcapitata was separated by repeated column chromatography, and the compounds were identified on the basis of spectroscopic analysis(IR, EI-MS, 1HNMR and 13CNMR) and physicochemical properties.
  
  
  RESULTS
  Four compounds were isolated from the root bark of A. subcapitata. Their structures were identified as 3 beta-hydroxy-oleana-11, 13(18)-dien-28-oic acid(I), 3-oxo-oleana-12-en-28-oic acid (II), oleanolic acid(III) and daucosterol(IV).
  
  
  CONCLUSIONS
  All these compounds were isolated from this plant for the first time. Among them, compounds I and II were obtained for the first time from Aralia.
authors.affiliation: Institute of Medicinal Plants, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100094.
authors.forename: X
authors.initials: X
authors.lastname: Xu
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Yang
authors.forename: Z
authors.initials: Z
authors.lastname: Zhu
mesh_terms: D027983:Aralia / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D019684:Magnoliopsida / Q000737:chemistry; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000737:chemistry / Q000302:isolation & purification; D024301:Plant Bark / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C470264:3-hydroxyoleana-11,13(18)-dien-28-oic acid; C470263:3-oxooleana-12-en-28-oic acid; D004365:Drugs, Chinese Herbal; D012855:Sitosterols; D014315:Triterpenes; D009828:Oleanolic Acid; C011015:lyoniside