Compounds of formula I: or pharmaceutically acceptable salts thereof are disclosed. Also disclosed are pharmaceutical compositions comprising a compound of formula I, processes for preparing compounds of formula I, intermediates useful for preparing compounds of formula I and therapeutic methods for treating a Retroviridae viral infection including an infection caused by the HIV virus.本發明揭示一種式I化合物：或其醫藥上可接受之鹽類。本發明亦揭示包含式I化合物之醫藥組成物，製備式I化合物之方法，有用於製備式I化合物之中間物，及治療反轉錄病毒科(Retroviridae)病毒感染(包括由HIV病毒引起的感染)之治療方法。
