title: [Studies on the chemical constituents in herb of Mentha haplocalyx].
abstract: OBJECTIVE
  To study the chemical constituents of Mentha haplocalyx.
  
  
  METHODS
  The chemical constituents were isolated and purified with column chromatography and the structures were elucidated by spectral analysis.
  
  
  RESULTS
  Nine compounds were obtained and identified as emodin (I), chrysophanol (II), physcione (II), benzoic acid (IV), trans-cinnamic acid (V), beta-sitosterol (VI), aloe-emodin (VII), ursolic acid (VIII) and daucosterol (IX).
  
  
  CONCLUSIONS
  Compounds I, II, III, V, VII were first isolated from M. haplocalyx.
authors.affiliation: School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing 100102, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.forename: Yuan-Hu
authors.initials: YH
authors.lastname: Zhang
authors.forename: Ren-Bing
authors.initials: RB
authors.lastname: Shi
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification*; D004642:Emodin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification*; D027541:Mentha / Q000737:chemistry*; D035261:Plant Components, Aerial / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D000880:Anthraquinones; C518327:aloe emodin; C008905:physcione; D004642:Emodin; C027113:chrysophanic acid