| Literature DB >> 16002106 |
Dang Ngoc Quang1, Yuuki Arakawa, Toshihiro Hashimoto, Yoshinori Asakawa.
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.Entities:
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Year: 2005 PMID： 16002106 DOI： 10.1016/j.phytochem.2005.05.020
Source DB: PubMed Journal: Phytochemistry ISSN： 0031-9422 Impact factor: 4.072