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helleborus thibetanus/glycoside

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New minor spirostanol glycosides from Helleborus thibetanus.

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Phytochemical reinvestigation of the dried roots and rhizomes of Helleborus thibetanus afforded four new minor spirostanol glycosides (1-4) and four known spirostanol glycosides (5-8). Their structures were determined on the basis of spectroscopic analyses, including 1D and 2D NMR experiments,

Three new spirostanol glycosides from Helleborus thibetanus.

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An ongoing chemical investigation on n-BuOH extract of roots and rhizomes of Helleborus thibetanus afforded three new spirostanol glycosides (1-3). Their structures were elucidated by extensive analysis of 1 D, 2 D NMR spectra, together with IR and MS methods and acid hydrolysis. This is the first
The current study aimed to examine the anticancer activity of HTF-1, a cardiac glycoside (CG) isolated from Helleborus thibetanus Franch, using a cell-based model and to discover the underlying mechanisms with specific focus on autophagy. We found that HTF-1 was able to potently decrease the
Experiments have been undertaken and for the first time, we have identified that a new cardiac glycoside (CG) isolated from Helleborus thibetanus Franch. a plant endemic to China, bears potent anti-cancer activity. We have named it as HTF-1. By using in vitro cell models, we have found that HTF-1

Three new steroidal saponins from Helleborus thibetanus.

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Three new steroidal saponins including two spirostanol glycosides (1-2) and one furostanol glycoside 1-sulphate (3) were isolated from the dried roots and rhizomes of Helleborus thibetanus. Structures of the compounds were determined on the basis of extensive use of 1-D and 2-D NMR experiments,

Two new bufadienolides from the rhizomes of Helleborus thibetanus with inhibitory activities against prostate cancer cells.

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Two new bufadienolide glycosides (1 and 2) with an A/B trans ring fusion together with nine known compounds (3-11) were isolated from the rhizomes of Helleborus thibetanus. The structures of new compounds were elucidated by extensive spectroscopic analyses in combination with single-crystal X-ray
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