Cis epsilon-viniferin: A new antifungal resveratrol dehydrodimer from Cyphostemma crotalarioides roots

Six antifungal constituents were isolated from the roots of Cyphostemma cro talarioides (Vitaceae): a new product, Cis-epsilon-viniferin 3, along with five known compounds: trans-resveratrol 1 and its oligomers: trans epsilon- viniferin 2, gnetin C 4, pallidol 5 and gnetin E 6. It is the first time su ch compounds have been reported in this plant species. The roots tissues we re found to be rich in other resveratrol oligomers, however, the available amounts of the other purified products did not allow structure investigatio ns. No fungicidal activity was detected in the leaves of this plant.