Views: 0 Author: Site Editor Publish Time: 2022-04-20 Origin: Site
After isolation and identification, there are more than 70 kinds of organic compounds and no less than 15 kinds of inorganic mineral elements, which can be roughly divided into iridoids, lignans, flavonoids, Eucommia gum, phenylpropanoids, phenols, amino acids, polysaccharides, fatty acids and vitamins.
Iridoid compounds are unstable in nature and easy to be oxidized and decomposed. They are high in fresh Eucommia ulmoides leaves. More than 20 iridoid compounds have been isolated from Eucommia ulmoides leaves, mainly including cheyeoside, geniposide acid, aucubin, harpagoside acetate, ajugaoside, Eucommia glycoside, eucommitol and rapamycin.
Lignans include 27 compounds, including pinoresin, oleoresin, dihydrodehydrocarbitol, directional lipol diglucoside and so on. The main component is terpineol diglucoside, which can reduce blood pressure.
The content of flavonoids in Eucommia ulmoides leaves is high, which has significant effects on antioxidation, anti-cancer and prevention of cardiovascular diseases. More than ten kinds of flavonoids have been found in Eucommia ulmoides leaves, mainly including quercetin, quercetin glycoside, astragaloside, kaempferol, isoquercetin, rutin, kaempferoside, etc.
Eucommia ulmoides gum exists in glue containing cells in different parts of Eucommia ulmoides. It is trans polyisoprene. It is a natural polymer, and its content in Eucommia ulmoides leaves is relatively low.
Phenylpropanoids are precursors for the formation of lignans, including coumaric acid, conic acid, dihydrocaffeic acid, caffeic acid, eugenoside, m-hydroxyphenylpropanoic acid, guaiacol, etc. there are few reports on phenylpropanoids, mostly focusing on the active components such as chlorogenic acid and vanillic acid, and the content and activity of chlorogenic acid are studied most.
Polysaccharides and fatty acids
The polysaccharide in Eucommia ulmoides leaves is easily soluble in water, tasteless, gray white powder and insoluble in high concentration organic solvents.
Eucommia ulmoides leaves contain 15 kinds of amino acids, with few free amino acids, mainly including threonine, methionine, arginine, histidine, leucine, isoleucine, lysine and glutamate, among which the contents of arginine and histidine are high.
Vitamins, trace elements and other ingredients
Eucommia ulmoides leaves are rich in vitamins and carotene, vitamin B2 and Trace Vitamin B1, which is closely related to the anti-aging and cellular immune ability of Eucommia ulmoides. There are 15 kinds of mineral elements, including trace elements such as zinc, copper and iron and macro elements such as calcium, potassium, phosphorus and magnesium. Eucommia ulmoides leaves also contain other components, such as digitaloprolactone, tartaric acid β- Sitosterol, carotene, etc. 35 volatile components, alkaloids, glucoside, etc.