Compounds having drug and bio-affecting properties, their pharmaceutical compositions and methods of use are set forth. In particular, C-17 and C-3 modified triterpenoids that possess unique antiviral activity are provided as HIV maturation inhibitors, as represented by compounds of Formulas I, II and III: These compounds are useful for the treatment of HIV and AIDS.本發明係關於具有藥物及生物作用性質的化合物、其醫藥組合物及使用方法。特定言之,提供具有獨特抗病毒活性之C-17及C-3經修飾三萜類化合物作為HIV成熟抑制劑,如由式I、式II及式III之化合物所表示:此等化合物適用於治療HIV及AIDS。