title: [A new alkaloid from Opuntia vulgaris].
abstract: OBJECTIVE
  To study the chemical constituents of the stems of Opuntia vulgaris Mill(Cactaceae).
  
  
  METHODS
  The compounds of Opuntia vulgaris were isolated by chromatography of Amberlite Dowex 50 and silica gel, and identified by means of UV, IR, MS, 1D and 2D NMR.
  
  
  RESULTS
  Three compounds were isolated and identified as: opuntin B(I), 4-hydroxyproline(II) and tyrosine(III).
  
  
  CONCLUSIONS
  Compound I is a new alkaloid.
authors.affiliation: Department of Phytochemistry, China Pharmaceutical University, Nanjing 210038, China. njjjq@hotmail.com
authors.forename: Jian-qin
authors.initials: JQ
authors.lastname: Jiang
authors.forename: Wen-cai
authors.initials: WC
authors.lastname: Ye
authors.forename: Yu-hong
authors.initials: YH
authors.lastname: Liu
authors.forename: Zhen
authors.initials: Z
authors.lastname: Chen
authors.forename: Zhi-da
authors.initials: ZD
authors.lastname: Min
authors.forename: Feng-chang
authors.initials: FC
authors.lastname: Lou
mesh_terms: D006909:Hydroxyproline / Q000737:chemistry / Q000302:isolation & purification; D008301:Maleimides / Q000737:chemistry / Q000302:isolation & purification*; D008968:Molecular Conformation; D015394:Molecular Structure; D029747:Opuntia / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D014443:Tyrosine / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D008301:Maleimides; D010636:Phenols; C484706:opuntin B; D014443:Tyrosine; D006909:Hydroxyproline