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从银杏外种皮中分出5个化合物，其中2个系首次从外种皮中分离得到，分别鉴定为银杏黄素（ginkgetin）和异银杏黄素（isoginkgetin）。另3个化合物为氢化白果，白果酚和白果醇。
Five compounds were isolated from the ginkgo biloba outer seed coat, of which two were first isolated from the outer seed coat and identified as ginkgetin and isoginkin (isoginkgetin). The other three compounds are hydrogenated ginkgo, ginkgo and glycol.