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Autor:
Evgeniya S. Skurydina, O. F. Veselova, Iu. N. Maliar, Svetlana A. Kuznetsova, Galina P. Skvortsova
Publikováno v:
Russian Journal of Bioorganic Chemistry. 40:742-747
Betulin-containing products were obtained in a yield of about 40% from absolutely dry birch bark. The content of betulin in the products was 74–75% or 85–89% depending on the presence of sodium or potassium hydroxide, respectively. The one-step m