Compounds having drug and bio-affecting properties, their pharmaceutical compositions and methods of use are set forth. In particular, C-19 modified triterpenoids that possess unique antiviral activity are provided as HIV maturation inhibitors, as represented by compounds of Formulas I and II: These compounds are useful for the treatment of HIV and AIDS.本發明闡述具有藥物及生物作用性質之化合物、其醫藥組合物及使用方法。具體而言,提供具有獨特抗病毒活性之C-19經修飾類三萜化合物作為HIV成熟抑制劑,如由式I及式II之化合物代表:該等化合物可用於治療HIV及AIDS。