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Solid-phase Synthesis of [4.4] Spirocyclic Oximes
Published on: February 6, 2019
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21,24-Cyclolanostanes revisited: Structural revision and biological evaluation
Chao Wang1, Lirong Wang2, Jilong Wang3
1School of Biological Science and Technology, University of Jinan, Jinan 250022, China.
Fitoterapia
|December 18, 2021
Summary
This study isolated new lanostane triterpenoids from Inonotus obliquus. Compound 2 demonstrated significant anti-breast cancer activity by inhibiting tumor cell proliferation and migration.
Area of Science:
- Natural Product Chemistry
- Medicinal Chemistry
- Pharmacology
Background:
- Inonotus obliquus is a medicinal mushroom known for its bioactive compounds.
- Triterpenoids are a diverse class of natural products with various pharmacological properties.
- Previous studies have identified triterpenoids from Inonotus obliquus, but structural characterization requires ongoing investigation.
Purpose of the Study:
- To isolate and characterize new lanostane-type triterpenoids from Inonotus obliquus.
- To correct and revise the structures of previously reported cyclolanostanes.
- To evaluate the cytotoxic and anti-cancer potential of the isolated compounds.
Main Methods:
- Chemical fractionation of Inonotus obliquus EtOH extract.
- Spectroscopic analyses (NMR, MS) for structural elucidation.
- Single crystal X-ray crystallography for structural confirmation.
- Cytotoxicity assays against various tumor cell lines.
- In vitro assays for anti-breast cancer activity (proliferation, migration).
Main Results:
- Isolation of eleven lanostane-type triterpenoids, including two new compounds (1 and 8).
- Structural correction of several previously reported 21,24-cyclolanostanes using X-ray diffraction data.
- Compounds 2, 6, and 8 exhibited significant cytostatic effects (IC50: 7.80–18.5 μM).
- Compound 2 showed promising in vitro anti-breast cancer activity against 4T1 cells.
Conclusions:
- The study successfully identified and characterized novel triterpenoids from Inonotus obliquus.
- Structural revisions were made for several known cyclolanostanes, enhancing chemical knowledge.
- Compound 2 represents a potential lead for breast cancer therapy due to its demonstrated in vitro efficacy.
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