槲皮素(quercetin)是一种黄酮类化合物,广泛存在于植物中。近年我国研究防治慢性气管炎的中草药,从红旱莲、猫眼草、红管药、鸡素苔、矮地茶、(?)木等不少民间草药中分得槲皮素,证明为活性成分之一。据报道槲皮素具有止咳、祛痰、平喘、解痉、降压、扩冠、降血脂、抗过敏、抗菌、抗癌等广泛的药理作 Quercetin is a flavonoid that is widely found in plants. In recent years, China has studied Chinese herbal medicines for prevention and treatment of chronic bronchitis, and has obtained quercetin from a number of folk herbs such as red nasturtium, cat’s eye grass, red tube medicine, sauerkraut, short tea, and (?) wood. one. Quercetin has been reported to have extensive pharmacological activities such as antitussive, expectorant, antiasthmatic, antispasmodic, antihypertensive, coronary expansion, hypolipidemic, antiallergic, antibacterial and anticancer effects.