Three new isoflavones from the (Willd.) and their bioactivities.

Three new isoflavones, 7-acetyl-4',6-dimethoxy-isoflavone (), 7-acetyl-4'-hydroxy-6-methoxy-isoflavone () and 7-acetyl-6,8-dimethoxy-4'-hydroxy-isoflavone (), together with five known flavones (-), were isolated from the (Willd.). Their structures were elucidated by spectroscopic methods, including extensive 1D- and 2D NMR techniques.