| abstract |
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for extracting Ginkgo biloba from a ginkgo biloba extract, liquid-liquid extraction, passing colum, crystallization, get ride the Ginkgo fluoride has beater to fluoride (C 15 H 18 O 8) 25.0% ~ 50.0%, Ginkgo fluoride a (C 20 H 24 O 9 ) 20.0% ~ 45.0%, Ginkgo fluoride B (C 20 H 24 O 10) the total amount of 10.0% ~ 30.0%, Ginkgo fluoride C (C 20 H 24 O 11) contains 5.0% ~ 15.0%, and beater to fluoride, Ginkgo fluoride a, Ginkgo fluoride B, Ginkgo fluoride C is greater than 95% . |