Trefolane A, a sesquiterpenoid with a new skeleton from cultures of the basidiomycete Tremella foliacea.
Trefolane A (1), an unprecedented skeleton with a 5/6/4 tricyclic ring system, was isolated from cultures of the basidiomycete Tremella foliacea. The structure was elucidated by means of spectroscopic methods and further confirmed by single crystal X-ray diffraction analysis. A possible biogenesis for trefolane A (1) was also proposed.
Two novel norsesquiterpene peroxides from basidiomycete Steccherinum ochraceum
Two novel 3-nor-methyl-chamigrane sesquiterpene peroxides, named steperoxide A (1) and B (2), have been isolated from basidiomycete Steccherinum ochraceum. This is the first report on the isolation of chamigrane sesquiterpene from higher fungi. The structures of 1 and 2 were established on the basis of spectroscopic data and single-crystal X-ray analysis. (C) 2010 Elsevier Ltd. All rights reserved.
Biosynthesis of the sesquiterpenoids, botrydial and dihydrobotrydial
The origin of the carbon skeleton of botrydial and dihydrobotrydial has been defined using [4,5-13C2]- mevalonic acid.