Absolute bioavailability of ginkgolide compounds in rats Separation and purification of bilobalide and ginkgolides A, B, and C from Ginkgo biloba leaves by high-speed counter-current chromatography Improvement of assay on terpene lactones in Yinxingye Dropping Pill Correlation of in vitro release between total flavonoids and different ingredients in sustained-release pellets of Ginkgo biloba extract by f2 fit factor method Improvement of assay on terpene lactones in Yinxingye Dropping Pill