title: [Studies on the chemical constituents from the leave of Paulownia tomentosa].
abstract: OBJECTIVE
  To study the chemical constituents of the leave of Paulownia tomentosa.
  
  
  METHODS
  The constituents were isolated by column chromatography and their structures were elucidated through spectroscopic analysis.
  
  
  RESULTS
  The compounds were identified as apigenin(I), uteolin(II), homoeriodictyol(III), 3alpha-hydroxyurs-12-en-28-oic acid (IV),3beta,19alpha-dihydroxyurs-12en-28-oic acid (pomolic acid)(V),2alpha,3a-dihydroxyurs-12-en-28-oic acid(VI),ursolic acid (VII),2alpha,3beta-dihydroxyolean-12-en-28-oic acid (maslinic acid) (VIII), daucosterol(IX),beta-sitosterol(X).
  
  
  CONCLUSIONS
  The compound I-X are obtained from the leave of Paulownia tomentosa (Thunb.) Steud for the first time.
authors.affiliation: Lanzhou University Second Hospital, Lanzhou 730000, China.
authors.forename: De-li
authors.initials: DL
authors.lastname: Zhang
authors.forename: Xiao-qiang
authors.initials: XQ
authors.lastname: Li
mesh_terms: D000431:Ethanol / Q000737:chemistry; D047309:Flavones / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D028083:Scrophulariaceae / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D000097245:Ursolic Acid
chemical_list: D000431:Ethanol; D047309:Flavones; D012855:Sitosterols; D014315:Triterpenes; D000097245:Ursolic Acid; C025473:gamma-sitosterol; C503231:homoeriodictyol