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Betulin (lup-20(29)-ene-3β,28-diol) is an abundant naturally occurring triterpene. It is commonly isolated from the bark of birch trees and forms up to 30% of the dry weight of the extractive . The purpose of the compound in the bark is not known. It can be converted to betulinic acid (the alcohol group replaced by a carboxylic acid group), which is biologically more active than betulin itself.
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|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Betulin". A list of authors is available in Wikipedia.|