Steroidal saponins from the bulbs of Allium karataviense.
Chemical examination of the bulbs of Allium karataviense led to the isolation of five new spirostanol saponins (7-11) and a new furostanol saponin (12), together with a known steroidal sapogenin (1) and five known saponins (2-6). The structures of the new saponins were determined by detailed analysis of their spectral data, including two-dimensional NMR spectroscopy. The steroidal saponins produced by A. karataviense, except for 5 and 6, were found to be based upon (25R)-5 alpha-spirostane-2 alpha,3 beta,5,6 beta-tetrol (alliogenin) and contain a beta-D-glucopyranosyl moiety with the formation of an O-glycoside linkage to C-2 of the polyhydroxylated steroidal skeleton as the common structural feature. The isolated compounds were evaluated for cytostatic activity against human promyelocytic leukemia HL-60 cells.
School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan.
Y
Y
Mimaki
M
M
Kuroda
T
T
Fukasawa
Y
Y
Sashida
D000490:Allium / Q000737:chemistry*; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002240:Carbohydrate Sequence; D004354:Drug Screening Assays, Antitumor; D018922:HL-60 Cells; D006801:Humans; D006868:Hydrolysis; D008969:Molecular Sequence Data; D018517:Plant Roots / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
D000972:Antineoplastic Agents, Phytogenic; D012503:Saponins; D013256:Steroids