Protoilludane sesquiterpenes from the wood decomposing fungus Granulobasidium vellereum (Ellis & Cragin) Jülich

► The secondary metabolites of the fungus Granulobasidium vellereum were studied. ► Six protoilludanes were isolated, of which three were not previously described. ► The compounds were tested against potential natural antagonists to G. vellereum.