黄酮类(Flavonoids)是指具有C_6-C_3-C_6碳骨架的一大类化合物,其中C_6是芳香环,关于他们的分类、结构、生物合成和分布,近年来已有许多专著。有证据表明,某些黄酮类具有药理作用和营养作用,它们统称为“维生素P”或“生物黄酮体”,大部分是黄酮和双氢黄酮的衍生物,如槲皮素、芦丁、柚皮甙、橙皮素和橙皮甙。长期来一直认为黄酮类在一级代谢中无明显功能。近年来,对这种观点提出了不同的看法,因为根据进化论观点,任何能够存在的生化机理必然能够产生某种有利的产物。黄酮类分布极广,包括被子植物及低等植物如藻类和苔藓。到目前为止,文献已报道天然黄酮类有二 Flavonoids refer to a broad class of compounds having a carbon skeleton of C 6-C 3 -C 6 wherein C 6 is an aromatic ring and many monographs have been published in recent years regarding their classification, structure, biosynthesis and distribution. There is evidence that certain flavonoids have pharmacological and nutritional effects and are collectively referred to as “Vitamin P” or “bioflavonoids”, most of which are derivatives of flavones and flavonoids such as quercetin, rutin, pomelo Pigeonin, hesperetin and hesperidin. It has long been believed that flavonoids have no significant function in primary metabolism. In recent years, different views have been put forward on this view, because according to the theory of evolution, any biochemical mechanism that can exist must necessarily produce some favorable product. Flavonoids are widely distributed, including angiosperms and lower plants such as algae and moss. So far, the literature has reported two natural flavonoids