Eucommia ulmoides Oliv., the sole species of the genus Eucommia and the family Eucommiaceae, is a native tree in China. The bark is a high-value product and commonly used in traditional Chinese. Now it is widely cultivated in Japanese and Korean. In the bark of E. ulmoides Oliv., the main chemical constituents are iridoids, lignans, and flavonoids.
In Chinese traditional medicine, the bark of the plant has been used for treat lower back pain, aching knees, it also has used as tonic and anti-st...