Chemical Studies on the Oriental Plant Drugs. XXVI. Saponins and Sapogenins of Ginseng. The Absolute Configurations of Cinenic Acid and Panaxadiol

抄録

(-) Cinenic acid was obtained by stepwise degradation of panaxadiol (I). The Rconfiguration of (-) cinenic acid (II) and its methyl ester (X) was established by the derivation from R-(-) linalool. Consequently, the absolute configuration at C₍₂₀₎ of panaxadiol was proved to be R.