title: Constituents of the fungi Daedalea quercina and Daedaleopsis confragosa var. tricolor.
abstract: Phytochemical examination of solvent extracts of the wood-rotting fungi Daedalea quercina and Daedaleopsis confragosa var. tricolor led to the isolation of five new triterpene derivatives and some known fungal constituents. All structures were identified by one- and two-dimensional NMR spectroscopy and mass spectrometry. From Daedalea quercina, the new natural products 16-O-acetylpolyporenic acid C, 16alpha-acetoxy-24-methylene-3-oxolanost-8-en-21-oic acid, (+)-24-methylene-3,23-dioxolanost-8-en-26-oic acid, (+)-3beta,12beta-dihydroxy-24-methyl-23-oxolanost-8-en-26-oi c acid and 12beta,23-epoxy-3alpha,23-dihydroxy-24-methyllanost-8- en-26-oic acid could be isolated. From Daedaleopsis confragosa var. tricolor, the compounds 3alpha-carboxyacetoxyquercinic acid, 3alpha-carboxyacetoxy-24-methylene-23-oxolanost-8-en-2 6-oic acid and 5alpha,8alpha-epidioxyergosta-6,22-dien-3beta-ol were identified. These are the first described triterpene derivatives isolated from this fungus.
authors.affiliation: Institut für Organische Chenmic Universität Hamburg, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Rösecke
authors.forename: W A
authors.initials: WA
authors.lastname: König
mesh_terms: D001685:Biological Factors / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D020072:Polyporales / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: D001685:Biological Factors