申请人:SPH Xing Ling Sci. & Tech. Pharmaceutical Co.,
Ltd.
公开号:EP3842053A1
公开(公告)日:2021-06-30
Provided is an extract of Ginkgo biloba leaves as a crude drug, prepared by alcohol extraction of Ginkgo biloba leaves, comprising ≤4.0% of rutin, ≤0.4% of quercetin, 2.6-4.8% of bilobalide, 0.1-0.5% of ginkgolide J, ≤0.5% of residual ethanol, and ≤ 0.02% of biflavones, the biflavones comprising amentoflavone, bilobetin, and ginkgetin. The extract does not comprise genistin and ginkgolide M. Also provided is a method for preparing the extract of Ginkgo biloba leaves as a crude drug, comprising: extracting minced Ginkgo biloba leaves with an aqueous ethanol solution by heating under reflux, followed by filtration to obtain a filtrate; subjecting the filtrate to concentration followed by precipitation in water to obtain a supernatant, which is then centrifuged to obtain a centrifugate; loading the centrifugate to a macroporous resin column and conducting water washing and solvent elution to obtain a first eluate, then loading a low concentration solvent first eluate to a polyamide column and conducting water washing and ethanol elution to obtain a second eluate; combining the second eluate with a high concentration solvent first eluate and conducting concentration, followed by extraction, drying, milling, sieving, and blending. The resulting extract of Ginkgo biloba leaves as a crude drug can be prepared into various formulations containing the extract.
本发明提供了一种银杏叶提取物粗药,由银杏叶醇提制备而成,其中芦丁含量≤4.0%,槲皮素含量≤0.4%,双叶皂甙含量2.6-4.8%,银杏内酯J含量0.1-0.5%,残留乙醇含量≤0.5%,双黄酮含量≤0.02%,双黄酮包括门冬酰胺黄酮、双叶黄素和银杏黄素。提取物中不包括染料木苷和银杏内酯 M。还提供了一种制备银杏叶提取物粗药的方法,包括用乙醇水溶液在回流下加热提取碎银杏叶,然后过滤,得到滤液; 将滤液浓缩,然后在水中沉淀,得到上清液,然后离心,得到离心物;将离心液装入大孔树脂柱,进行水洗和溶剂洗脱,得到第一洗脱液,然后将低浓度溶剂第一洗脱液装入聚酰胺柱,进行水洗和乙醇洗脱,得到第二洗脱液;将第二洗脱液与高浓度溶剂第一洗脱液混合,进行浓缩,然后进行提取、干燥、研磨、筛分和混合。由此得到的银杏叶提取物作为一种粗制药物,可配制成各种含有该提取物的制剂。