Ginkgo leaf extract as well as preparation method and application thereof

The invention relates to a ginkgo leaf extract as well as a preparation method and application thereof. The prepared ginkgo leaf extract contains 20-25wt% of gingko flavones, 2-4wt% of ginkgolides and 2-4wt% of bilobalides. The preparation method of the ginkgo leaf extract comprises the following st...

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Bibliographic Details
Main Authors LI FAN, YU MENGFEI, YI JIANMING, MA LIN
Format Patent
LanguageChinese
English
Published 16.11.2016
Subjects
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS
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Summary:The invention relates to a ginkgo leaf extract as well as a preparation method and application thereof. The prepared ginkgo leaf extract contains 20-25wt% of gingko flavones, 2-4wt% of ginkgolides and 2-4wt% of bilobalides. The preparation method of the ginkgo leaf extract comprises the following steps: extracting ethanol; concentrating the extract, and then carrying out water precipitation; treating with an acidic alumina column; eluting with ethanol containing acetic acid; and carrying out vacuum concentration and drying on the eluent. The preparation method of the ginkgo leaf extract is simple and efficient; the prepared ginkgo leaf extract is capable of effectively relaxing the tracheal smooth muscle of a mouse so as to be used for treating asthma; and meanwhile, the ginkgo leaf extract has the advantages of low toxicity, safe medication and high safety, thereby providing a novel and safe drug for treating asthma clinically. 本发明涉及种银杏叶提取物及其制备方法和应用，本发明制备的银杏叶提取物包含银杏黄酮、银杏内酯和白果内酯，所述银杏黄酮含量为20～25wt％、银杏内酯含量为2～4wt
Bibliography:Application Number: CN20161570822