Aethiopinolones A–E, New Pregnenolone Type Steroids from the East African Basidiomycete Fomitiporia aethiopica

Chepkirui, Clara;Sum, Winnie;Cheng, Tian;Matasyoh, Josphat;Stadler, Marc;et.al.
(2018) Molecules — Vol. 23, p. 369 (2018)

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Authors
  • Chepkirui, ClaraDepartment of Microbial Drugs, Helmholtz Centre for Infection Research and German Centre for Infection Research (DZIF), Partner Site Hannover/Braunschweig, Braunschweig, Germany;
    Author
  • Sum, WinnieDepartment of Biochemistry, Egerton University, Njoro, Kenya
    Author
  • Cheng, TianDepartment of Microbial Drugs, Helmholtz Centre for Infection Research and German Centre for Infection Research (DZIF), Partner Site Hannover/Braunschweig, Braunschweig, Germany;
    Author
  • Matasyoh, JosphatDepartment of Chemistry, Egerton University, Njoro, Kenya
    Author
  • Decock, ConyUCLouvain
    Author
  • Stadler, MarcDepartment of Microbial Drugs, Helmholtz Centre for Infection Research and German Centre for Infection Research (DZIF), Partner Site Hannover/Braunschweig, Braunschweig, Germany;
    Author
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Abstract
A mycelial culture of the Kenyan basidiomycete Fomitiporia aethiopica was fermented on rice and the cultures were extracted with methanol. Subsequent HPLC profiling and preparative chromatography of its crude extract led to the isolation of five previously undescribed pregnenolone type triterpenes 1–5, for which we propose the trivial name aethiopinolones A–E. The chemical structures of the aethiopinolones were determined by extensive 1D- and 2D-NMR, and HRMS data analysis. The compounds exhibited moderate cytotoxic effects against various human cancer cell lines, but they were found devoid of significant nematicidal and antimicrobial activities.
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Citations

Chepkirui, C., Sum, W., Cheng, T., Matasyoh, J., Decock, C., & Stadler, M. (2018). Aethiopinolones A–E, New Pregnenolone Type Steroids from the East African Basidiomycete Fomitiporia aethiopica. Molecules, 23, 369. https://doi.org/10.3390/molecules23020369 (Original work published 2018)