title: Steroidal oligoglycosides from the seeds of Allium tuberosum.
abstract: Three new spirostanol steroidal oligoglycosides, together with a known oligoglycoside, were obtained from the seeds of Allium tuberosum after enzymatic hydrolysis of furostanol saponin fraction by beta-glucosidase. On the basis of spectroscopic analysis, the structure of new spirostanol oligoglycosides were elucidated as (25S)-spirost-5-ene-2alpha,3beta-diol 3-O-alpha-L-rhamnopyranosyl-(1-->4)-[alpha-L-rhamnopyranosyl-(1-->2)]-be ta-D-glucopyranoside, (25S)-spirostane-3beta,5beta,6alpha-triol 3-O-alpha-L-rhamnopyranosyl-(1-->4)-beta-D-glucopyranoside, and (25S)-5beta-spirostane-3beta,6alpha-diol 3-O-alpha-L-rhamnopyranosyl-(1-->4)-beta-D-glucopyranoside.
authors.affiliation: Faculty of Pharmaceutical Sciences, Kumamoto University, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ikeda
authors.forename: H
authors.initials: H
authors.lastname: Tsumagari
authors.forename: T
authors.initials: T
authors.lastname: Nohara
mesh_terms: D000490:Allium / Q000737:chemistry*; D000972:Antineoplastic Agents, Phytogenic / Q000032:analysis / Q000494:pharmacology; D000998:Antiviral Agents / Q000032:analysis / Q000494:pharmacology; D002240:Carbohydrate Sequence; D006027:Glycosides / Q000032:analysis* / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D008969:Molecular Sequence Data; D009844:Oligosaccharides / Q000032:analysis* / Q000494:pharmacology; D009904:Optical Rotation; D012639:Seeds / Q000737:chemistry; D016339:Spectrometry, Mass, Fast Atom Bombardment
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D000998:Antiviral Agents; D006027:Glycosides; D009844:Oligosaccharides