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- W2736404144 abstract "A new method for extraction of diacetate betulin from birch bark was developed using a mixture of anhydride acetic acid and acetic acid with percentages of 64% and 36% consecutively. The temperature of extraction was 130 °C which gave a good yield, the extraction time didn’t exceed 48 hours. The structure and the purity of betulin diacetate was confirmed by the following measurements and techniques: melting point, element analysis, HPLC, 1H NMR, 13C NMR, DEPT and FTIR spectroscopy." @default.
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- W2736404144 date "2017-05-05" @default.
- W2736404144 modified "2023-09-28" @default.
- W2736404144 title "Effective Method of Extraction of Betulin Diacetate from Birch Bark" @default.
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