... %,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/ ... 0.8-1.2, Ginkgolic Acid<5ppm14) Pure ginkgo biloba extract:Total Flavone Glycosides 24%,Total Lactones6%, Quercetin Glycoside/ ...