title: New furostanol glycosides, chinenoside IV and V, from Allium chinense.
abstract: Further studies on water-soluble components in the bulbs of Allium chinense G. Don have led to the isolation of two new furostanol saponins, chinenoside IV (1) and V (2). On the basis of chemical evidence and spectral analyses [1H-, 13C-NMR (DEPT), 1H-1H COSY (COSY45 and p-type), 1H-1H relay-COSY, 1H-13C COSY, HMBC, and FAB-MS], the structure of 1 was established as 26-O-beta-glucopyranosyl-3 beta,26-dihydroxy-23-hydroxymethyl-25(R)- 5 alpha-furost-20(22)-en-6-one 3-O-beta-xylopyranosyl(1-->4)-[alpha- arabinopyranosyl(1-->6)]-beta-glucopyranoside and that of 2 to be 26-O-beta-glucopyranosyl-3 beta, 26-dihydroxy-23-hydroxymethyl-25-(R)-5 alpha-furost-20(22)-en-6-one 3-O-alpha-arabinopyranosyl (1-->6)-beta- glucopyranoside, respectively.
authors.affiliation: Department of Applied Medicine, Institute Radiation Medicine, Beijing, China.
authors.forename: J
authors.initials: J
authors.lastname: Peng
authors.forename: X
authors.initials: X
authors.lastname: Yao
authors.forename: Y
authors.initials: Y
authors.lastname: Tezuka
authors.forename: T
authors.initials: T
authors.lastname: Kikuchi
authors.forename: T
authors.initials: T
authors.lastname: Narui
mesh_terms: D000490:Allium; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D006027:Glycosides / Q000737:chemistry*; D008969:Molecular Sequence Data; D015394:Molecular Structure; D018517:Plant Roots; D010946:Plants, Medicinal; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D013256:Steroids
chemical_list: D006027:Glycosides; D012503:Saponins; D013256:Steroids; C103061:chinenoside IV; C103062:chinenoside V