title: 8,14-Secopregnane glycosides from the aerial parts of Asclepias tuberosa.
abstract: Twenty pregnane glycosides, tuberoside A(1)-L(5), were isolated from the diethyl ether-soluble fraction of the MeOH extract from the aerial parts of Asclepias tuberosa (Asclepiadaceae). The pregnane glycosides were composed of 8,12;8,20-diepoxy-8,14-secopregnane as aglycon, and D-cymarose, D-oleandrose, D-digitoxose and/or D-glucose as the component sugars. Their structures were established using NMR spectroscopic analysis and chemical methodologies.
authors.affiliation: Institute for Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan. warashin@u-shizuoka-ken.ac.jp
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Warashina
authors.forename: Tadataka
authors.initials: T
authors.lastname: Noro
mesh_terms: D031108:Asclepias / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D035261:Plant Components, Aerial / Q000737:chemistry*; D011278:Pregnanes / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry; D013256:Steroids / Q000737:chemistry
chemical_list: D006027:Glycosides; D011278:Pregnanes; D012503:Saponins; D013256:Steroids; C436828:tuberoside