Revision of $^{13}C$-NMR Data in Some (20R)-ginsenosides

수종의 (20R)-ginsenosides에 대한 $^{13}C$-NMR 데이터의 수정

The chemical shifts of C-21 and C-23 in the $^{13}C$-NMR for (20R)-protopanaxatriol, (20R)-ginsenoside $Rh_1$ and (20R)-ginsenoside $Rg_3$ were revised by employing some extensive 2D-NMR techniques.