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沙棘（ＨｉｐｐＯｐｈａｅｒｈａｍｎｏｉｄｅｓ）为胡颓子科植物，其果实是含有黄酮类成份的中药材，具有降低血管脆性的功能，也是对高血压及脑溢血的辅助治疗剂。黄酮甙类由于黄酮母核中含有碱性氧原子，一般又多带有酚羟基，能与ＡＩ’”产生黄色络合物，在ＮａＮＯ２的碱
Hippophae rhamnoides is a family of Elaeagnus and its fruit is a Chinese herbal medicine containing flavonoids, which has the function of reducing blood vessel fragility and is also an adjuvant therapeutic agent for hypertension and cerebral hemorrhage. Flavonoids because of flavonoids mother nucleus contains basic oxygen atoms, usually with more phenolic hydroxyl groups, with AI ’"to produce a yellow complex in NaNO2 base