... Ginkgolic Acid<0.5ppm (USP standard)12) Pure ginkgo biloba extract:Total Flavone Glycosides 24%,Total Lactones6%, Quercetin Glycoside/ ... Kaempferol Glycoside=0.8-1.213) Pure ginkgo biloba extract:Total Flavone Glycosides 24%,Total Lactones6%, Quercetin Glycoside ... 6%, Ginkgolic Acid<1ppm(EP standard)16) Water soluble Pure ginkgo biloba extract:Total Flavone Glycosides 24%,Total Lactones6%, Quercetin ...