Compounds for the treatment of human immunodeficiency virus (HIV) infection are disclosed. The compound has the formula (IA), including its stereoisomer and pharmaceutically acceptable salts, wherein a, a ', R1 and R2 are as defined herein. Methods related to the preparation and use of such compounds and pharmaceutical compositions containing such compounds are also disclosed.公開了用於治療人免疫缺陷病毒(HIV)感染的化合物。所述化合物具有下式(Ia),包括其立體異構體和藥學上可接受的鹽,其中A、A’、R1和R2如本文中所定義。還公開了與此類化合物的製備和用途相關的方法,以及包含此類化合物的藥物組合物。