The invention provides methods for separating outer birch bark from inner birch bark. The invention also provides methods for isolating betulin; lupeol; betulinic acid; 9,10-epoxy-18-hydroxyoctadecanoic acid; 9,10,18-trihydroxyoctadecanoic acid; polyphenolic polymers and fatty acids from birch bark.

La invención proporciona los métodos para separar la corteza externa del abedul de corteza interna del abedul. La invención también proporciona los métodos para aislar betulin; lupeol; ácido betulinic; ácido 9,10-epoxy-18-hydroxyoctadecanoic; ácido 9,10,18-trihydroxyoctadecanoic; los polímeros polyphenolic y los ácidos grasos del abedul raspan.

 
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