New lanostane-type triterpenes from Fomes officinalis

Area of Science:

• Natural Product Chemistry
• Organic Chemistry
• Mycology

Background:

• Fomes officinalis, a fungus, is a source of bioactive compounds.
• Triterpenes are a class of organic compounds with diverse biological activities.
• Lanostane-type triterpenes are characterized by a specific four-ring structure.

Purpose of the Study:

• To isolate and characterize new lanostane-type triterpenes from Fomes officinalis.
• To elucidate the chemical structures of the isolated compounds.
• To contribute to the understanding of the chemical diversity of fungal metabolites.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation through comprehensive spectral analysis (NMR, MS).
• Chemical methods and comparison with known compounds for structural confirmation.

Main Results:

• Five new lanostane-type triterpenes, named fomefficinic acid A-E (1-5), were successfully isolated.
• The structures were determined as: 24-methylene-3-oxo-lanost-8-en-21-oic acid (1), 3alpha,15alpha-dihydroxy-24-methylene-lanosta-7,9(11)-dien-21-oic acid (2), 3alpha,15alpha-dihydroxy-24-methylene-lanost-8-en-21-oic acid (3), 15alpha-hydroxy-3-oxo-24-methylenelanost-8-en-21-oic acid (4), and 15alpha-acetoxy-3-oxo-24-methylenelanosta-7,9(11)-dien-21-oic acid (5).
• The structural assignments were confirmed by spectral data and chemical evidence.

Conclusions:

• The study successfully identified five novel lanostane-type triterpenes from Fomes officinalis.
• The findings expand the known chemical constituents of this fungal species.
• This research provides valuable data for further investigation into the biological activities of these compounds.