title: [Chemical constituents from the leaves of crataegus pinnatifida Bge. var. major N.E.Br].
abstract: OBJECTIVE
  To study the chemical constituents in the leaves of Crataegus pinnatifida Bge. var. major N.E.Br..
  
  
  METHODS
  Compounds were isolated by using porous resin, silica gel, polyamide chromatographic techniques etc. Their structures were elucidated by chemical and spectroscopic methods.
  
  
  RESULTS
  Eight compounds were identified as pinnatifin I (1), quercetin (2), 3-O-beta-D-glucopyranosyl quercetin (3), 3-O-beta-D-galacopyranosyl quercetin (4), 3-O-beta-D-glucopyranosyl (6-->1)-alpha-L-rhamnosyl quercetin (5), 3-O-beta-D-galacopyranosyl (6-->1)-alpha-L-rhamnosyl quercetin (6), kaempferol (7), 7-O-alpha-L-rhamnosyl-3-O-beta-D- glucopyranosyl kaempferol (8).
  
  
  CONCLUSIONS
  Compound 1 is a new compound. Compound 8 was isolated from this plant for the first time.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China. pczhang@imm.ac.cn
authors.forename: P C
authors.initials: PC
authors.lastname: Zhang
authors.forename: S X
authors.initials: SX
authors.lastname: Xu
mesh_terms: D027825:Crataegus / Q000737:chemistry*; D044950:Flavanones / Q000737:chemistry / Q000302:isolation & purification*; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000737:chemistry / Q000302:isolation & purification; D013141:Spiro Compounds / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D044950:Flavanones; D044949:Kaempferols; D013141:Spiro Compounds; C481184:pinnatifin I; C006552:kaempferol; D011794:Quercetin