title: [Chemical constituents of Laggera pterodonta].
abstract: OBJECTIVE
  To study the chemical constituents of Laggera pterodonta.
  
  
  METHODS
  The ethanol extract of L. pterodonta was isolated by column chromatogramphy on silica gel, ODS, and Sephadex LH-20 to afford compounds. The structures of the obtained compounds were identified by chemical reactions and spectroscopic analysis.
  
  
  RESULTS
  Nineteen compounds were separated and identified to be pterodondiol (1), ilicic acid (2), artemitin (3), chrysosplenetin B (4), 3,5-dihydroxy-3',4',6,7-tetramethoxyflavone (5), chrysosplenol D (6), 5,6,4'-trihydroxy-3,7-dimethoxyflavone (7), quercetin (8), tamarixetin (9), patuletin (10), quercetin-3-O-beta-D-galactopyranoside (11), patuletin-3-O-beta-D-glucopyranoside (12), helichrysoside (13), 4,5,7-trihydroxy-6-methoxyflavone-3-O-beta-D-rutinoside (14), kaempferol-3-O-beta-D-glucopyranoside (15), stigmasterol (16), stigmasterol 3-O-beta-D-glucopyranoside (17), 2-hydroxy-benzoic acid (18), beta-sitosterol (19).
  
  
  CONCLUSIONS
  Compounds 5, 7, 9-15, and 17-18 were isolated from this plant for the first time. The 13C-NMR data of compound 7 is reported for the first time.
authors.affiliation: Institute of Traditional Chinese Medicine & Natural Products, Ji'nan University, Guangzhou 510632, China. liubailian@sohu.com
authors.forename: Bailian
authors.initials: B
authors.lastname: Liu
authors.forename: Ting
authors.initials: T
authors.lastname: Zhang
authors.forename: Xiaoqi
authors.initials: X
authors.lastname: Zhang
authors.forename: Wencai
authors.initials: W
authors.lastname: Ye
authors.forename: Yaolan
authors.initials: Y
authors.lastname: Li
mesh_terms: D019659:Asteraceae / Q000737:chemistry*