Rhubarb chemical composition
chemical composition
The main components of rhubarb that have diarrhea effect are stilbene and diterpene oxime, and their diarrhoea effect is stronger than that of their corresponding glycosides. The following are available: Chrysophanol-1-monoglucoside or Chrysophaein, Emodin-6-monoglucoside, Aloe-emodin-8-glucose Aloe-emodin-8-monoglucoside, Physcion monoglucoside, Rhein-8-monoglucoside; Rheum palmatum also contains emodin diglucoside (Emodin Diglucosi- de), Aloe-emodin diglucoside, Chrysophanol diglucoside. The diterpenoid ketones are sennae A, B, C, D, E, F (Sennoside A, B, C, D, E, F). The diarrhea efficacy of rhubarb is directly proportional to the content of bound rhein, and the free terpenoids do not cause diarrhea. The diarrhea effect of senna panacea is stronger, but the content is far less than the latter.
The free terpenes are mainly Chrysophanol, Emodin, Physcion, Aloe-emodin and Rhein.
Rhubarb also contains Rheum tannic acids and related substances such as Gallic acid, Catechin, and Tetrarin. Such substances have antidiarrheal effect.
In addition, rhubarb still contains fatty acids, calcium oxalate, glucose, fructose and starch.
[Modern research] rhubarb rhizome contains rhein, emodin, chrysophanol, aloe-emodin, emodin and other free hydrazine derivatives, no diarrhea. Other glucosides containing the above substances and saponin derivatives A, B, C, etc., all have diarrhea. In addition, it contains tannins and so on. Rhubarb rhizomes and roots have heat diarrhea, destroy the product to eliminate phlegm, antibacterial and anti-inflammatory effects. Students use Jun as the drug, and use it as a drug after concoction. After charcoal, it can be used to stop bleeding. When taking a small dose, it has a stomach and astringent effect.
Rhubarb contains wolfberry, so it is yellow and has the effect of bowel movement. Also contains nearly 40% of calcium oxalate, so many hard residue. Other components include emodin, pectin, resin, rhein, rhubarb, and astringent rhein.
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