Steroids, fatty acids and ceramide from the mushroom Stropharia rugosoannulata Farlow apud Murrill

Stropharia rugosoannulata Farlow apud Murrill is an edible mushroom. Phytochemical investigation of the sporophore of Stropharia rugosoannulata resulted in isolation and identification of 16 compounds, including steroids (1-6), steroidal saponins (7), fatty acids (8–10), alkanes (11), ceramides (12), esters (13), pyrimidines (14), vitamins (15) and flavonoids (16). The structure elucidation of isolated compounds was achieved on the basis of NMR and mass spectral data. Compounds 4–16 were isolated for the first time from this genus and their chemotaxonomic significance was discussed. The isolation of steroids (4–5) and ceramides (12) might be used as chemotaxonomic markers for the genus of Stropharia.