Pachysandra Alkaloids. X. Structure of Epipachysandrine-A

Abstract

In succession to the structure determination of a number of 3, 20-diamino-5α-pregnane type alkaloids of Pachysandra terminalis SIEB. et ZUCC., another new alkaloid, epipachysandrine-A, which was obtained from the weakly basic alkaloid fraction was investigated. The structure and stereochemistry of the alkaloid was proved to be represented by the formula Ia.