title: Steroidal saponins from the bulbs of Allium schubertii.
abstract: Phytochemical examination of the fresh bulbs of Allium schubertii led to the isolation of four new steroidal saponins together with a known saponin. The structures of the new saponins were established by spectroscopic data, hydrolysis and chemical correlation as (25R and S)-5 alpha-spirostan-2 alpha,3 beta,6 beta-triol 3-O-beta-D-glucopyranosyl-(1-->2)-O-[4-O-benzoyl-beta-D-xylopyranosyl- (1-->3)]-O-beta-D-glucopyranosyl-(1-->4)-beta-D-galactopyranoside, (25R and S)-5 alpha-spirostan-2 alpha,3 beta,6 beta-triol 3-O-beta-D-glucopyranosyl-(1-->2)-O-[3-O-benzoyl-beta-D-xylopyranosyl- (1-->3)]-O-beta-D-glucopyranosyl-(1-->4)-beta-D-galactopyranoside, (25R and S)-5 alpha-spirostan-2 alpha,3 beta,6 beta-triol 3-O-beta-D-glucopyranosyl-(1-->2)-O-[4-O-(3S)-3-hydroxy-3-methylgluta royl- beta-D-xylopyranosyl-(1-->3)]-O-beta-D-glucopyranosyl-(1-->4)-beta-D- galactopyranoside and 26-O-beta-D-glucopyranosyl-(25R and S)-5 alpha-furostan-2 alpha,3 beta,6 beta,22 zeta,26-pentol 3-O-beta-D-glucopyranosyl-(1-->2)-O-[beta-D-xylopyranosyl-(1-->3)]-O-bet a- D-glucopyranosyl-(1-->4)-beta-D-galactopyranoside, respectively.
authors.affiliation: Tokyo College of Pharmacy, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kawashima
authors.forename: Y
authors.initials: Y
authors.lastname: Mimaki
authors.forename: Y
authors.initials: Y
authors.lastname: Sashida
mesh_terms: D000490:Allium / Q000737:chemistry*; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D012503:Saponins; D013256:Steroids