title: Two toxic kaurene glycosides from the burrs of Xanthium pungens.
abstract: Two H2O-soluble toxic kaurene glycosides 3 and 4 responsible in part for the poisonous properties of the burr of Xanthium pungens have been isolated and identified. The structures of the compounds were elucidated using high resolution 2D nmr and mass spectral techniques.
authors.affiliation: Research School of Chemistry, Australian National University, Canberra.
authors.forename: J K
authors.initials: JK
authors.lastname: MacLeod
authors.forename: P D
authors.initials: PD
authors.lastname: Moeller
authors.forename: F P
authors.initials: FP
authors.lastname: Franke
mesh_terms: D001278:Atractyloside / Q000031:analogs & derivatives; D055598:Chemical Phenomena; D002621:Chemistry; D004224:Diterpenes; D045786:Diterpenes, Kaurane; D006027:Glycosides / Q000302:isolation & purification* / Q000633:toxicity; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010947:Plants, Toxic / Q000032:analysis*
chemical_list: D004224:Diterpenes; D045786:Diterpenes, Kaurane; D006027:Glycosides; D001278:Atractyloside; C002627:kaurene; C003853:carboxyatractyloside