Isolation, Purification and Identification of Active Chemical Compound Lup-20(29)-ene-3, 28-diol (Betulin) from Tetradium daniellii Leaves and Study the hypoglycemic Effect on Rabbits. UTJsci. 2016;6(1):54-61. doi:10.32792/utq/utjsci/v6i1.45