New Tricholomalides D–G from the Mushroom <i>Tricholoma ustaloides</i> Grown in an Italian Beech Wood

Abstract

Four novel seconeodolastane diterpenoids, named tricholomalides D–G, were isolated, together with the known tricholomalide C, from the fruiting bodies of Tricholoma ustaloides Romagn., a species belonging to the large Tricholoma genus of higher mushrooms (Basidiomycota, family Tricholomataceae). They were isolated through multiple chromatographic separations, and the structures, including the absolute configuration, were established through a detailed analysis of MS, NMR, and CD spectral data and comparison with related compounds reported in the literature, which has been thoroughly revised.

Keywords

• <i>Tricholoma ustaloides</i>
• <i>Tricholomataceae</i> (<i>Basidiomycota</i>)
• seconeodolastane diterpenoids
• tricholomalides
• CD spectra
• absolute configuration