title: [Chemical constituents from the twigs and leaves of Melodinus suaveolens].
abstract: OBJECTIVE
  To investigate the chemical constituents from the twigs and leaves of Melodinus suaveolens.
  
  
  METHODS
  The chemical consituents were separated and purified by column chromatographies with silica gel, Sephadex LH-20, ODS and RP-HPLC. Their structures were identified on the basis of physicochemical properties and spectral analysis.
  
  
  RESULTS
  Ten compounds were isolated and identified as ursolic acid (1), 22alpha-hydroxyursolic acid (2), betulinic acid (3), betulinic alcohol (4), 2,3-dihydroxy-1-(4-hydroxy-3-methoxyphenyl) -propan-1-one (5), (+)-isolariciresinol (6), (+/-)-liquiritigenin (7), salicylic acid (8), beta-sitosterol (9) and daucosterol (10), respectively.
  
  
  CONCLUSIONS
  NMR spectra of compound 2 are reported for the first time, and compounds 1 - 10 are firstly isolated from this plant.
authors.affiliation: Guangdong Province Key Laboratory of Pharmaceutical Constituents of TCM and New Drugs Research/Institute of Traditional Chinese Medicine & Natural Products, Jinan University, Guangzhou 510632, China.
authors.forename: Yong-Bin
authors.initials: YB
authors.lastname: Tong
authors.forename: Wen-Jing
authors.initials: WJ
authors.lastname: Wang
authors.forename: Guo-Qiang
authors.initials: GQ
authors.lastname: Li
authors.forename: Jing-Quan
authors.initials: JQ
authors.lastname: Yuan
authors.forename: Xiao-Qi
authors.initials: XQ
authors.lastname: Zhang
authors.forename: Wen-Cai
authors.initials: WC
authors.lastname: Ye
mesh_terms: D029062:Apocynaceae / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D004365:Drugs, Chinese Herbal; D014315:Triterpenes