Title: Method for extracting ginkgo lactone and preparation containing the same
Application Number: 97107809 Application Date: 1997.12.02
Publication Number: 1195665 Publication Date: 1998.10.14
Approval Pub. Date: Granted Pub. Date: 2000.08.02
International Classifi-cation: A61K35/78,C07G17/00
Applicant(s) Name: Zhou Guozhu Address:
Inventor(s) Name: Zhou Guozhu
Attorney & Agent: hu ronghui
Abstract:
     The present invention discloses a method for extracting ginkgolide and preparation containing ginkgolide. Said extracting method includes the following steps: using ginkgo leaf or ginkgo root bark as raw material, boiling it by adding water, filtering to obtain filtrate, using adsorbent whose dose is 10-15% of the weight of the filtrate to make adsorption for 24-96 hr, fitering, desorption of seraparated adsorbent for 4-12 hr by using ethyl alcohol whose weight is 15-30 times that of the adsorbent, filtering, concentrating filtrate, recovering ethyl alcohol, residual standstill, separating out coarse crystal grains, dissolving them in organic solvent, filtering, separating out insoluble impurity, residual standstill, separating out crystal grains and drying at 60-120 deg.C, so obtaining the invented product with high purity. Said invention is safe, simple in production process and low in cost.
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