Studies on the lupin alkaloids. VII. Isolation and structure of (-)-.DELTA.7-dehydrosophoramine.

Abstract

The alkaloids of the epigeal part of Japanese Sophora flavescens AITON were investigated for the first time, and (-)-Δ7-dehydrosophoramine (XII), the most highly unsaturated compound among the known lupin alkaloids of matrine type, was isolated and the structure was determined, and (+)-sophocarpine-N-oxide (XI) was isolated from this plant at first time.