Amur cork tree fruit oil is a pressed oil extracted from the fruit of Phellodendron amurense, the Amur Cork Tree. The bark of the tree is an important herbal medicine in China. The oil has insecticidal properties similar to pyrethrum. The oil contains a variety of biologically active substances, including flavonoids (diosmin), alkaloids (berberine, yatroriccin, palmatine), saponins and coumarins. Medicinal applications of the oil include treatment of pancreatitis, reduction of cholesterol and sugar in blood and the treatment of various skin diseases.