Separation, structural eluciation and synthesis of some derivatives a-amyrine isolated from Ehretia dentata Courch
Abstract
A mixture of three triterpenes was isolated with high yield (0.566%) fi'om the leaves of
Ehretia dentata Couch, growing in Hoa Binh province. These compounds could not be separated hy CC and preparative TLC. However, on a chemical derivatization we could determine that the main compounds are a-amyrine and its isomer hauerenol.