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采用沸水浸泡银杏叶、乙醇抽提水浸膏、乙酸乙酯萃取内酯的生产工艺，所得白色晶体经HPLC检测含银杏内酯为81.5％，产品得率为0.6％。
The production process of soaking Ginkgo biloba leaves in boiling water, extracting water with ethanol, and extracting lactone with ethyl acetate yielded white crystals containing 81.5% ginkgolides by HPLC, and the product yield was 0.6%.