Oleanolic acid which is a three pentacyclic triterpenoids isolated from Gentianaceae plants of Swertia mileensis the whole grass or privet fruit, with a free body and glycosides in many plants. Oleanolic acid has a wide range in plants, and the average content is 0.2% - 2%. Cucurbitaceae high content is 1.5% ~ hunchback bottom 2%, privet fruit content of 0.6% ~ 0.7%.

1.Oleanolic acid is relatively non-toxic,antitumor,and hepatoprotective,as well as exhibiting antiviral properties.
2.Oleanolic acid was found to exhibit strong anti-HIV activity.
3.Oleanolic acid is a major protector of cells against oxidative and electrophile stress.
4.Oleanolic acid has great effect on trating virus hepatitis, acute icteric hepatitis and chronic hepatitis.