Sesquiterpenes from the endophytic fungus Periconia sp. F-31.

One new eremophilane sesquiterpene periconianone L ( 1 ), together with four known guaiane-type sesquiterpenes 4,10,11-trihydroxyguaiane ( 2 ), (-)-guai-1(10)-ene-4 α ,11-diolhydroxymecuration ( 3 ), guaidiol A ( 4 ), and epi-guaidiol A ( 5 ) were isolated from the endophytic fungus Periconia sp. F-31. The structure of the new compound was established by spectroscopic methods, including UV, IR, HRESIMS, and extensive NMR techniques. Compound 3 was isolated as natural product for the first time.