spirostanol/leucemie

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Spirostanol pentaglycosides from the underground parts of polianthestuberosa.

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Phytochemical analysis of the underground parts of Polianthes tuberosa has resulted in the isolation of four new spirostanol saponins with five monosaccharides (1-4). Their structures were determined by spectroscopic analysis, including extensive 1D and 2D NMR data, and the results of hydrolytic

Apoptosis and pro-death autophagy induced by a spirostanol saponin isolated from Rohdea chinensis (Baker) N. Tanaka (synonym Tupistra chinensis Baker) on HL-60 cells.

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BACKGROUND Our previous study has revealed that the spirostanol saponins isolated from the rhizomes of Rohdea chinensis (Baker) N. Tanaka (synonym Tupistra chinensis Baker) (Convallariaceae) (a reputed folk medicine) exhibited potent antiproliferative activity. However, the underlying mechanism of

Spirostanol saponins from the rhizomes of Tacca chantrieri and their cytotoxic activity.

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The rhizomes of Tacca chantrieri have been analysed for steroidal saponin constituents, resulting in the isolation of four new spirostanol saponins (1-4), along with one known saponin (5); their structures were elucidated on the basis of extensive spectroscopic analysis, including 2D NMR, and the

Aculeoside B, a new bisdesmosidic spirostanol saponin from the underground parts of Ruscus aculeatus.

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From the underground parts of Ruscus aculeatus, a new bisdesmosidic spirostanol saponin named aculeosides B (2) was isolated, and its structure was determined on the basis of spectroscopic analysis, including 2D NMR techniques. Aculeoside A (1), which was previously isolated from the same plant

Steroidal glycosides from the underground parts of Hosta plantaginea var. japonica and their cytostatic activity on leukaemia HL-60 cells.

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A new C22-steroid glycoside was isolated from the underground parts of Hosta plantaginea var. japonica, together with a known furostanol saponin and three known spirostanol saponins. The structure of the new steroid glycoside was characterized by spectroscopic analysis and acid-catalysed hydrolysis

Cytotoxicity of a naturally occuring spirostanol saponin, progenin III, towards a broad range of cancer cell lines by induction of apoptosis, autophagy and necroptosis

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This study was aimed to investigate the cytotoxic potential of a natural compound, progenin III on a broad range of cancer cell lines, including various sensitive and drug-resistant phenotypes. The cytotoxicity, progenin III-induced autophagic, ferroptotic and necroptotic cell death were evaluated

Tuberoside M, a new cytotoxic spirostanol saponin from the seeds of Allium tuberosum.

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Tuberoside M (1), isolated from the seeds of Allium tuberosum, shows a significant inhibitory effect on the growth of the human promyelocytic leukemia cell line (HL-60) with IC50 value of 6.8 microg/ml. On the basis of spectral data and chemical reaction, its structure was established as

Steroidal glycosides from the bulbs of Fritillaria meleagris and their cytotoxic activities.

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Steroidal glycosides (1-18), including 10 new compounds (1-10), were isolated from the bulbs of Fritillaria meleagris (Liliaceae). The structures of the new compounds were determined by two-dimensional (2D) NMR analysis, and by hydrolytic cleavage followed by spectroscopic and chromatographic

New steroidal glycosides from rhizomes of Clintonia udensis.

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A total of 10 steroidal glycosides, together with three new spirostanol glycosides (6-8), a new furostanol glycoside (9), and a new cholestane glycoside (10), were isolated from the rhizomes of Clintonia udensis (Liliaceae). The structures of the new compounds were determined on the basis of

Steroidal saponins from the bulbs of Allium karataviense.

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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

A Total of Eight Novel Steroidal Glycosides Based on Spirostan, Furostan, Pseudofurostan, and Cholestane from the Leaves of Cestrum newellii

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Previously, various steroidal glycosides were reported from plants of Cestrum species. However, phytochemical investigation has not been conducted on Cestrum newellii. A systematic phytochemical investigation of the leaves of C. newellii resulted in the isolation of eight novel

Novel Steroidal Glycosides from the Whole Plants of Helleborus foetidus.

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Phytochemical analysis of the whole Helleborus foetidus plants identified 28 steroidal glycosides (1-28), including 20 novel spirostanol glycosides (1-20) and a novel furostanol glycoside (21). The structures of the newly identified compounds were elucidated by two-dimensional NMR spectroscopy and

Steroidal saponins from Dracaena surculosa.

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A phytochemical investigation of the whole plant of Dracaena surculosa resulted in the isolation of nine steroidal saponins, including three new bisdesmosidic spirostanol saponins, named surculosides A (1), B (2), and C (3), and a new bisdesmosidic furostanol saponin (4), which are based on

Steroidal glycosides from Furcraea foetida and their cytotoxic activity.

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Two new spirostanol glycosides (1, 2) and a new furostanol glycoside (3), together with nine known steroidal glycosides (4-12) were isolated from the leaves of Furcraea foetida (Agavaceae). The structures of the new compounds were determined by spectroscopic analysis and the results of hydrolytic

Steroidal saponins from the leaves of Cestrum sendtenerianum.

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Five steroidal saponins were isolated from the EtOH extract of Cestrium sendtenerianum (Solanaceae), as confirmed by detailed analysis of their 1H, 13C, and two-dimensional NMR spectral data, and by the results of hydrolytic cleavage. The saponins were revealed to contain three hydroxyl groups at

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