Pharmacology research showed that serratane-type triterpenoids exhibited significant anti-tumor promoting effect [7] and DNA topoisomerase II inhibitory effect [8]. Furthermore, serratane-type triterpenoids, such as 3α-methoxyserrat-14-en-21β-ol, exerted clear inhibitory effects on the development of lung lesions induced in the DMBDD carcinogenesis model [9]