Massarinolins A−C: New Bioactive Sesquiterpenoids from the Aquatic Fungus Massarina tunicata

Abstract
Massarinolins A−C (1−3), three new bioactive sesquiterpenoids possessing rare ring systems, have been isolated from liquid cultures of the aquatic fungus Massarina tunicata Shearer & Fallah. The structures were determined primarily by analysis of NMR data. Metabolites 1−3 are the first compounds to be reported from any member of the genus Massarina.