Abstract
Separation of the immunosuppressive principles from Rehmanniae radix was done by monitoring
hemolytic plaque-forming cells (HPFC) inhibitory activity to give two new phenethyl
alcohol glycosides: jionosides A1 (4) and B1 (5), along with six known compounds: acetoside, isoacteoside, purpureaside C, echinacoside,
and cistanosides A and F.