title: New spirostanol saponins from Chinese chives (Allium tuberosum).
abstract: Three new spirostanol saponins have been isolated from the seeds of Allium tuberosum. On the basis of acid hydrolysis and comprehensive spectroscopic analysis, their structures were established as tuberoside J, (25R)-5alpha-spirostan-2alpha,3beta,27-triol 3-O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranoside; tuberoside K, (25R)-5alpha-spirostan-2alpha,3beta,27-triol 3-O-alpha-L-rhamnopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl-(1-->4)]-beta-D-glucopyranoside; and tuberoside L, 27-O-beta-D-glucopyranosyl-(25R)-5alpha-spirostan-2alpha,3beta,27-triol 3-O-alpha-D-rhamnopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl-(1-->4)]-beta-D-glucopyranoside.
authors.affiliation: Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, People's Republic of China.
authors.forename: S
authors.initials: S
authors.lastname: Sang
authors.forename: M
authors.initials: M
authors.lastname: Zou
authors.forename: Z
authors.initials: Z
authors.lastname: Xia
authors.forename: A
authors.initials: A
authors.lastname: Lao
authors.forename: Z
authors.initials: Z
authors.lastname: Chen
authors.forename: C T
authors.initials: CT
authors.lastname: Ho
mesh_terms: D000490:Allium / Q000737:chemistry* / Q000196:embryology; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D012503:Saponins / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D012639:Seeds / Q000737:chemistry; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013150:Spirostans / Q000032:analysis*; D013256:Steroids / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D012503:Saponins; D013150:Spirostans; D013256:Steroids; C436828:tuberoside