Configurational studies on hydroxy groups at C-2, 3 and 23 or 24 of oleanene and ursene-type triterpenes by NMR spectroscopy
- H. Kojima, H. Ogura
Hypoglycemic activity-guided fractionation together with chemical analysis led to the isolation of two triterpenes (ursolic acid and oleanolic acid) from the chloroform extract of the dried stem of B. terniflora. Identification was based on spectroscopic methods. The compounds lowered blood sugar levels in normal and alloxan-diabetic mice.