Stilbene Derivatives from <i>Cissus</i> <i>quadrangularis</i>

Abstract

Three new stilbene derivatives, quadrangularins A, B, and C (2−4), have been isolated from the stems of Cissus quadrangularis, together with four known ones: resveratrol, piceatannol, pallidol (1), and parthenocissine A (5). Structure elucidation of the new compounds was achieved using 2D NMR experiments.