Application of Eupatilin in preparation of pulmonary fibrosis resistant drugs
A technology for eupholzanthin and pulmonary fibrosis, which is applied in the field of natural chemical substances, can solve problems such as the application of eupholzanthin that have not been reported yet, and achieve the effect of wide practical value and clear pharmacological activity
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[0043] 1. Preparation and structure confirmation of eupholzanthin
[0044] Artemisia argyi Levl. et Vamt. is the dried leaf of Artemisia argyi Levl. et Vamt., purchased from Anguo, Hebei. Dry Artemisia argyi 10kg, heat and reflux extract 3 times with 70% ethanol solution by volume fraction, combine, recover the solvent under reduced pressure, concentrate the obtained aqueous solution and extract with petroleum ether, chloroform, ethyl acetate, n-butanol respectively. 100.0 g of the chloroform extraction layer was eluted through silica gel column chromatography with chloroform-methanol (100:0-0:100) as the mobile phase to obtain 5 fractions A-E, and fraction B was eluted through silica gel column chromatography with chloroform-methanol (100:0-0- 2:1) was used as the mobile phase for elution to obtain 3 fractions a, b, and c. Fraction a was prepared by recrystallization to obtain eupholzanthin. The physical and chemical properties and spectral data are as follows: yellow powde...
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