黄酮是药用植物中特别重要的化合物,而且在植物中分布很广,一般以甙的形式存在。在植物的粗提物中很难将其全部定量,因为大多数参照化合物不易买到。异鼠李黄素、山柰酚、木犀草素、杨梅黄素和槲皮素是下列药用植物的主要甙元,例如:山金车属(Arnica spec.)、桦属、金盏花、柳叶菜属(Epilobium spec.)、问荆、款冬。像榆蚊子草(Filipendula ulmaria)、银杏、胡桃、报春花属(Primula spec.)、李属,某些柳属 Flavonoids are particularly important compounds in medicinal plants, and are widely distributed in plants, generally in the form of earthworms. It is difficult to quantify all of the crude extracts in plants because most of the reference compounds are not readily available. Isorhamnetin, kaempferol, luteolin, myricetin, and quercetin are the main components of medicinal plants such as Arnica spec., Betula, Calendula, and Epilobium (Epilobium spec.), Equinoxa, and Coltsfoot. Like Filipendula ulmaria, ginkgo, walnut, Primula spec., Prunus, some Salix