Marasmane and normarasumane sesquiterpenenoids from the edible mushroom Russula nigricans

Publication date: September 2017 Source:Phytochemistry Letters, Volume 21 Author(s): Masahiko Isaka, Arunrat Yangchum, Sarunyou Wongkanoun, Surisa Kongthong Three new marasmane sesquiterpenes, russulanigrins A–C (1–3), and a new normarasmane, russulanigrin D (4), together with six known sesquiterpenes, 5, 6, isolactarorufin (7), 8, lactarorufin A (9), and 10, were isolated from fruiting bodies of the edible mushroom Russula nigricans. The structures were elucidated on the basis of NMR spectroscopic and mass spectrometry data. Compounds 4, 5, and 7 were inactive in several biological assays: anti-bacterial (Bacillus cereus and Enterococcus faecium), anti-mycobacterial (Mycobacterium tuberculosis H37Ra), anti-plasmodial (Plasmodium falciparum K1), and anti-fungal (Candida albicans) activities, and cytotoxicity to cancer cell-lines (KB, MCF-7, and NCI-H187). Graphical abstract
Source: Phytochemistry Letters - Category: Chemistry Source Type: research