Extractives from Derris scandens. Part I. The structures of scandenin and lonchocarpic acid

Abstract

The structures of scandenin and lonchocarpic acid have been elucidated. The compounds belong to a new group of isoflavonoids, the 4-hydroxy-3-phenylcoumarins. A synthesis of dimethyldihydroisonorscandenin has been carried out and partial degradation products of scandenin and lonchocarpic acid have been characterised and inter-related.