abstract |
(57) Abstract The present invention provides a method for separating the outer bark of birch from the inner bark of birch. The present invention also relates to isolating betulin; lupeol; betulinic acid; 9,10-epoxy-18-hydroxyoctadecanoic acid; 9,10,18-trihydroxyoctadecanoic acid; polyphenolic polymers and fatty acids from the outer bark of birch. To provide a way. The invention also provides a process for providing one or more (eg, 1, 2, 3 or 4) natural products from the outer bark of birch. |