Glisoprenins C, D and E, New Inhibitors of Appressorium Eormation in Magnaporthe grisea, from Cultures of Gliocladium roseum. 2. Structure Determination.

The structures of three new polyterpenoids, glisoprenins C (2a), D (3) and E (4), isolated from submerged cultures of the deuteromycete Gliocladium roseum HA190-95 as inhibitors of appressorium formation in Magnaporthe grisea, were determined by spectroscopic techniques.They are oxidised derivatives of glisoprenin