Ophiobolin E and 8-epi-ophiobolin J produced by Drechslera gigantea, a potential mycoherbicide of weedy grasses

We report the structure of two ophiobolins, named ophiobolins E (6) and 8-epi-ophiobolin J, produced by Drechslera gigantea, grown on liquid and solid culture, together to the well known ophiobolin B and J, phytotoxins with potential herbicidal activity.