Triterpenoid saponin R1 as well as glucose and cane sugar have been isolated from the Chinese herb Anemone raddeana Regel R1 was identified as 3-O-[a-L-rharnnopyranosyl-(1-4)-a-L-arabinopyranosyl]梠leanolic acid by spectres copy and chemical transformations It is a new saponin,which was named as raddeanin B. Triterpenoid saponin R1 as well as glucose and cane sugar have been isolated from the Chinese herb Anemone raddeana Regel R1 was identified as 3-O- [aL-rharnnopyranosyl- (1-4) -aL-arabinopyranosyl] 梠 leanolic acid by spectres copy and chemical transformations It is a new saponin, which was named as raddeanin B.