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  • Title: Lanostane triterpenoids from the inedible mushroom Fomitopsis spraguei.
    Author: Quang DN, Arakawa Y, Hashimoto T, Asakawa Y.
    Journal: Phytochemistry; 2005 Jul; 66(14):1656-61. PubMed ID: 16002106.
    Abstract:
    Investigation of the methanolic extract of the inedible mushroom Fomitopsis spraguei (Polyporaceae) led to the isolation of five lanostane-type triterpenoids (1-5): three new compounds named fomitopsins A-C (2-4), and two known compounds, quercinic acid C (1) and 3alpha-carboxyacetyl-12beta-hydroxyquercinic acid (5). Their structures were determined by 2D NMR, MS, IR, UV spectra, and X-ray crystallographic analyses. An X-ray crystal structure analysis of quercinic acid C (1) established its stereochemistry as 3R,12R-dihydroxy-24R-methyl-23-oxo-25S-lanost-8-en-26-oic acid.
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