title: [Studies on the chemical constituents of Pseudotsuga sinensis].
abstract: OBJECTIVE
  To study the chemical constituents of Pseudotsuga sinensis Dode (Pinaceae).
  
  
  METHODS
  To separate the constituents of P. sinensis by using various kinds of chromatography and identify their structures on the basis of spectral analysis.
  
  
  RESULTS
  Six compounds were isolated from P. sinensis. Their structures were established as 5,7,4'-trihydroxy-6-methylflavanone (poriol, I), 3,5,7,3',4'- pentahydroxyflavonone (quercetin, II), 5,7,3',5'-tetrahydroxy-6- methylflavanone (III), 5,7,3',5'-tetrahydroxyflavanone (IV), 3,5,7,3',5'-pentahydroxyflavanone (V) and 5-hydroxy-6-methylchromone-7-O-beta-D-glucopyranoside (VI) based on the analysis of spectral data of IR, UV, MS, 1D and 2D-NMR.
  
  
  CONCLUSIONS
  Compounds III and VI are new compounds. All of six compounds were isolated from this plant for the first time.
authors.affiliation: Sichuan Institute of Chinese Materia Medica, Chengdu 610041, China.
authors.forename: Jin-hai
authors.initials: JH
authors.lastname: Yi
authors.forename: Guo-lin
authors.initials: GL
authors.lastname: Zhang
authors.forename: Bo-gang
authors.initials: BG
authors.lastname: Li
mesh_terms: D002867:Chromones / Q000737:chemistry / Q000302:isolation & purification*; D044950:Flavanones / Q000737:chemistry / Q000302:isolation & purification*; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D024301:Plant Bark / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D028224:Pseudotsuga / Q000737:chemistry*; D011794:Quercetin / Q000737:chemistry / Q000302:isolation & purification
chemical_list: C479302:5,7,3',5'-tetrahydroxy-6-methylflavanone; C479303:5,7,3',5'-tetrahydroxyflavanone; C479340:5-hydroxy-6-methylchromone-7-O-glucopyranoside; D002867:Chromones; D044950:Flavanones; D005960:Glucosides; D011794:Quercetin