Studies on the Constituents of Asclepiadaceae Plants. XVI. On the Components of Metaplexis japonica MAKINO. III. The Structure of benzoylramanone.

Abstract

The structure of benzoylramanone (III), a new ester type aglycone from Metaplexis japonica MAKINO, has been proved by chemical conversions and spectroscopic examination of the conversion products. The structural conclusion have been confirmed by correlation with a degradation product from hecogenin.