title: A novel eleven-membered-ring triterpene dilactone, pseudolarolide F and A related compound, pseudolarolide E, from Pseudolarix kaempferi.
abstract: A novel eleven-membered-ring triterpene dilactone, pseudolarolide F (1), and a related compound, pseudolarolide E (2), were isolated from the seeds of Pseudolarix kaempferi, a plant indigenous to eastern China. Their structures and stereochemistry were established by spectroscopic studies, which included UV, IR, HREIMS, 2D NMR correlation methods (1H-1H COSY, 13C-H COSY, NOESY, HMQC, and HMBC), and single-crystal X-ray analysis.
authors.affiliation: State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Science.
authors.forename: G F
authors.initials: GF
authors.lastname: Chen
authors.forename: Z L
authors.initials: ZL
authors.lastname: Li
authors.forename: D J
authors.initials: DJ
authors.lastname: Pan
authors.forename: S H
authors.initials: SH
authors.lastname: Jiang
authors.forename: D Y
authors.initials: DY
authors.lastname: Zhu
mesh_terms: D002681:China; D002850:Chromatography, Gel; D018360:Crystallography, X-Ray; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D028201:Pinaceae / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D007783:Lactones; D014315:Triterpenes; C451582:pseudolarolide F