... and Terpene lactones, and have been used pharmaceutically. The flavone glycosides, such as keampferol, quercetin, isorhamnetin, ... have anti-oxidant and free radical properties. The ginkgolides, which are trilactonic diterpenes, include ginkgolide A, ... cholesterol levels. The Ginkgo biloba Leaf Extract used in dietary supplements is derived from the leaves of the plant Ginkgo biloba ...