title: Pregnane glycosides from Baseonema acuminatum.
abstract: Two new pregnane glycosides, baseonemoside A and B, were isolated from the aerial parts of Baseonema acuminatum. Their structures were established as pregn-5-ene-3beta,16alpha,20(S)-triol 3-O-beta-D-cymaropyranosyl-(1-->4)-beta-D-digitoxopyranoside 20-O-beta-D-glucopyranosyl-(1-->2)-beta-D-digitalopyranoside 1 and pregn-5-ene-3beta,16alpha,20(S)-triol 3-O-beta-D-cymaropyranosyl-(1-->4)-beta-D-cymaropyranosyl-(1-->4)-beta-D-digitoxopyranoside 20-O-beta-D-glucopyranosyl-(1-->2)-beta-D-digitalopyranoside 2, respectively, on the basis of spectral evidence and chemical transformation.
authors.affiliation: Centre National d'Application des Recherches Pharmaceutiques, B.P. 702, 101 Antananarivo, Madagascar.
authors.forename: V E
authors.initials: VE
authors.lastname: Rasamison
authors.forename: A L
authors.initials: AL
authors.lastname: Okunade
authors.forename: A M
authors.initials: AM
authors.lastname: Ratsimbason
authors.forename: E
authors.initials: E
authors.lastname: Rafidinarivo
mesh_terms: D006027:Glycosides / Q000737:chemistry*; D006801:Humans; D010936:Plant Extracts / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D011278:Pregnanes / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry
chemical_list: D006027:Glycosides; D010936:Plant Extracts; D011278:Pregnanes; D012503:Saponins; C426014:baseonemoside A; C426013:baseonemoside B