Chemical Studies on the Oriental Plant Drugs. XVI. The Stereochemistry of Protopanaxadiol, a Genuine Sapogenin of Ginseng

The stereochemical correlation of dihydroprotopanaxadiol (V) with dammaranediol-I (VI) has been established. It has concluded that protopanaxadiol and panaxadiol should have C/D trans 17β-H configuration and can be formulated as I and II respectively.