title: Norlanostane and lanostane glycosides from the bulbs of Chionodoxa luciliae and their cytotoxic activity.
abstract: Ten lanostane glycosides (1-10), including two new norlanostane glycosides (2 and 7) and a new lanostane glycoside with a spirolactone ring system (9), were isolated from the fresh bulbs of Chionodoxa luciliae (Liliaceae). The structures of the new compounds were determined on the basis of extensive spectroscopic analysis and the results of hydrolytic cleavage to be (23S)-3beta-[(O-beta-D-apiofuranosyl-(1-->2)-O-[beta-D-glucopyranosyl-(1-->3)]-O-beta-D-glucopyranosyl-(1-->2)-alpha-L-arabinopyranosyl-(1-->6)-beta-D-glucopyranosyl)oxy]-17alpha,23-epoxy-28,29-dihydroxy-27-norlanost-8-en-24-one (2), (23S)-17alpha,23-epoxy-29-hydroxy-3beta-[(O-alpha-L-rhamnopyranosyl-(1-->2)-O-[O-beta-D-glucopyranosyl-(1-->2)-beta-D-glucopyranosyl-(1-->3)]-O-beta-D-glucopyranosyl-(1-->2)-alpha-L-arabinopyranosyl-(1-->6)-beta-D-glucopyranosyl)oxy]-27-norlanost-8-ene-15,24-dione (7), and (23S,25R)-17alpha,23-epoxy-29-hydroxy-3beta-[(O-alpha-L-rhamnopyranosyl-(1-->2)-O-[beta-D-glucopyranosyl-(1-->3)]-O-beta-D-glucopyranosyl-(1-->2)-alpha-L-arabinopyranosyl-(1-->6)-beta-D-glucopyranosyl)oxy]lanost-8-en-23,26-olide (9), respectively. The cytotoxic activity of the isolated compounds against HSC-2 human oral squamous cell carcinoma cells are also reported.
authors.affiliation: Laboratory of Medicinal Plant Science, School of Pharmacy, Tokyo University of Pharmacy and Life Science, Tokyo, Japan.
authors.forename: Kazutomo
authors.initials: K
authors.lastname: Ori
authors.forename: Minpei
authors.initials: M
authors.lastname: Kuroda
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Mimaki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sakagami
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Sashida
mesh_terms: D002240:Carbohydrate Sequence; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification / Q000633:toxicity*; D006801:Humans; D019668:Liliaceae / Q000737:chemistry / Q000633:toxicity*; D008969:Molecular Sequence Data; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000633:toxicity; D018514:Plant Structures / Q000737:chemistry / Q000633:toxicity*; D014407:Tumor Cells, Cultured
chemical_list: D006027:Glycosides; D010936:Plant Extracts