title: Noroleanane saponins from Celmisia spectabilis.
abstract: Two new saponins were isolated as the major components of the deacylated saponin extract from the underground parts of Celmisia spectabilis. Their structures were established by NMR and mass spectral data and derivative formation as 2 beta,3 beta,17,23- tetrahydroxy-28-norolean-12-en-16-one-3-O-alpha-L-arabinopyrano syl (1-->2)-alpha-L-arabinopyranosyl(1-->6)-beta-D-glucopyranoside and 2 beta,3 beta,17,23- tetrahydroxy-28-norolean-12-en-16-one-3-O-alpha-L-arabinopyrano syl (1-->2)-alpha-L-arabinopyranosyl(1-->6)-[alpha-L-rhamnopyranosyl (1-->2)]-beta-D-glucopyranoside.
authors.affiliation: Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, Institut für Pharmazie, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Ueckert
authors.forename: V
authors.initials: V
authors.lastname: Wray
authors.forename: M
authors.initials: M
authors.lastname: Nimtz
authors.forename: T
authors.initials: T
authors.lastname: Schöpke
mesh_terms: D002236:Carbohydrate Conformation; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D009828:Oleanolic Acid / Q000031:analogs & derivatives*; D010944:Plants / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C116951:2,3,17,23-tetrahydroxy-28--norolean-12-en-16-one-3-O-arabinopyranosyl-1-2-arabinopyranosyl-1-6-(rhamnopyranosyl-1-2)glucopyranoside; C116950:2,3,17,23-tetrahydroxy-28-norolean-12-en-16-one-3-O-arabinopyranosyl-1-2-arabinopyranosyl-1-6-glucopyranoside; D012503:Saponins; D009828:Oleanolic Acid