Daqingye extract

[Product name] Daqing leaf extract [English name]br/> [Source] It is the dried leaves of the cruciferous plant Isatis indica
[Physical properties] Brown-yellow powder, slightly sour, bitter, and astringent in taste. Hygroscopicity
[Specifications]
[Main ingredients] Indirubin, woad glycoside, tryptophan, mustardin, neoglucoside, sulfoglycoside, etc.
[Identification] Take this copy Add chloroform to the product, heat to reflux for an hour, filter, and concentrate the filtrate to a final solution, which is used as the test solution. Take another reference substance of indigo and indirubin, add chloroform to make a mixed solution containing each. According to the thin layer chromatography (Appendix) test, absorb each of the above two solutions, place them on the same silica gel thin layer plate as a developing agent, develop, take out, and dry. In the chromatogram of the test product, the same blue spots and purple-red spots appear respectively at the corresponding positions of the chromatogram of the reference substance.
[Pharmacological effects] It is a heat-clearing and detoxifying drug that cools blood and eliminates spots. It is used for the treatment of warm evil, high fever, coma, macules and rash, jaundice, febrile dysentery, gills, sore throat, erysipelas, carbuncle. It has inhibitory effect on B surface antigen and influenza virus subtype A.