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International Journal of Medicinal Mushrooms
IF: 1.211 5-Year IF: 1.394 SJR: 0.433 SNIP: 0.661 CiteScore™: 1.38

ISSN Print: 1521-9437
ISSN Online: 1940-4344

International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushr.v11.i1.60
pages 55-60

Volatile Constituents of the Medicinal Fungus Chaga Inonotus obliquus (Pers.: Fr.) Pilát (Aphyllophoromycetideae)

Nahla Ayoub
Faculty of Pharmacy, Department of Pharmacognosy, University of Ain-Shams, Cairo, Egypt; and Institute of Pharmacy, Department of Pharmaceutical Biology and Microbiology, University of Hamburg, Germany
Dennis Lass
Institute of Organic Chemistry, University of Hamburg, Germany
Wulf Schultze
Institute of Pharmacy, Department of Pharmaceutical Biology and Microbiology, University of Hamburg, Germany


The anamorph of the wood-rotting medicinal fungus Chaga Inonotus obliquus, which is used for several medicinal purposes and in the preparation of a refreshing tea, produces small amounts (less than 0.01%) of a complex mixture of volatiles. These compounds were analyzed for the first time by gas chromatograph(y) (GC) and GC/mass spectrometer coupling (GC/MS); 58 of them could be identified, representing 86% of the total hydrodistillate. The nonterpenoid compound group consisted mainly of oxygenated aliphatic substances (48%), with fatty acids dominating (38.6%). Their principal constituent was linolic acid (21.5%). Nearly all the terpenes analyzed belong to the sesquiterpene group. Altogether, 18 of them could be identified (representing 32.5% of the hydrodistillate), with β-selinene (16.4%) as the dominating compound. Among these sesquiterpenes, cis- and trans-bergamotene, α-santalene, β-sesquifenchene, epi-β-santalene, photosantalol, and β- and γ- eudesmol are reported for the first time as volatile constituents of fungi.

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