title: [Studies on chemical constituents from bark of Morus nigra].
abstract: OBJECTIVE
  To investigate the chemical constituents in the barks of Morus nigra.
  
  
  METHODS
  The nine compounds were isolated and purified by column chromatography over silica gel, LH -20 and preparative HPLC and their structures were identified by various spectroscopic methods.
  
  
  RESULTS
  The nine compounds were isolated and identified as olcancolic acid , apigenin, cyclocommunol, morusin, cyclomorusin, kuwanon C, daucosterol, ursolic acid, 63-sitosterol.
  
  
  CONCLUSIONS
  Olcancolic acid, apingenin, cyclocommunol, morusin, cyclomorusin, kuwanon C, daucosterol were firstly isolated from the M. nigra.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Hong-Qing
authors.initials: HQ
authors.lastname: Wang
authors.forename: Ruo-Yun
authors.initials: RY
authors.lastname: Chen
mesh_terms: D047310:Apigenin / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D002845:Chromatography / Q000379:methods; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D013058:Mass Spectrometry / Q000379:methods; D031625:Morus / Q000737:chemistry*; D009828:Oleanolic Acid / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D024301:Plant Bark / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry
chemical_list: D005419:Flavonoids; C057451:morusin; D009828:Oleanolic Acid; D047310:Apigenin