IDENTIFICATION OF 2 STILBENOIDS FROM VITIS ROOTS

Two oligostilbenes were isolated from roots of Vitis vinifera cv. Char donnay and their structures were identified. One compound, ampelopsin A, is a dimer of resveratrol and has been found previously only in the roots of Ampelopsis brevipedunculata var. hancei (Vitaceae). The seco nd, hopeaphenol, can be regarded as a dimer of ampelopsin A; its prese nce in Vitaceae is reported here for the first time. Both compounds ar e present in mg per g levels in vine roots.