The present invention relates to novel compounds useful against HIV, and more particularly, to compounds derived from betulinic acid and other structurally related compounds which are useful as HIV maturation inhibitors, and to pharmaceutical compositions containing same, as well as to methods for their preparation and use.本發明闡述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-3及C-28經修飾樺木酸衍生物作為HIV成熟抑制劑。此等化合物適用於治療HIV及AIDS。