A new triterpenoid, 3b, 4b, 23-trihydroxy-24, 30-dinorolean-12, 20(29)-dien-28-oic acid, together with five known compounds, 2a, 3b, 23-trihydroxy-12-oleanen-28
DFT/6-311+g** level calculations are performed to study the electron transfer bond-breaking reaction of CH3-X. The calculated values are in good agreement with