Prepration of 20(R)- and 20(S)-Ginsenoside Rh1 from Ginsenoside Re

Ginsenoside Re로부터 20(R)- 및 20(S)- Ginsenoside Rh1의 조제

The mild hydrolysis of ginsenosie Re with 50% acetic acid gave a prosapogenin mixture, 20(R)- and 20(S)-ginsenoside Rg2. The products were acetylated to give the peracetates, which were further converted into 20(R)- and 20(S)-ginsenoside Rh1 by the alcoholic alkaline treatment.