| abstract |
Suggested are new extracts from the leaves of Ginkgo biloba, comprising (a) 20 to 30 % b.w. flavone glycosides, (b) 2.5 to 4.5 % b.w. ginkgolides A, B, C and J (in total), (c) 2.0 to 4. 0 % b.w. bilobalides, (d) less than 10 ppm alkyl phenol compounds and (e) more than 10 % b.w. oligomeric proanthocyanidins (OPC). |