<正> The bark and leaves of Eucommia ulmoides Oliv(Eucommiaceae) and "Siberian ginseng" (Ezoukogi inJapanese) prepared from the root bark or stem bark ofEleutherococcus senticosus Maxim (Acanthopanax senti-cosus Harms) have been used as tonic and anti-stressdrug. The extracts of Eucommia showed anti-hyperten-sive, anti-complementary, anti-oxidative, and anti-gastric ulcer effects, and promting collagen synthesis,accelating granuloma formation, and other pharmacologi-cal effects. The Siberian ginseng exhibited anti-fatigue,anti-stress, immuno-enhancing effect, CNS activity, andanti-depressive effect. By now, 40, 28, and 10 com-pounds have been isolated from Eucommia ulmoidesbark, Eucommia ulmoides leavs, and Siberian ginseng,respectively, and their structures were elucidated. Theirpharmacological activities were mainly due to lignans andiridoid glycosides.