The invention provides compounds having Formula (I):or a pharmaceutically acceptable salt thereof, as well as pharmaceutical compositions comprising the same, processes for their preparation, and methods of treating and preventing HIV infection by their administration.本發明提供具有式(I)之化合物:或其醫藥上可接受之鹽,以及包含其之醫藥組合物,其製備方法,及藉由其投與治療及預防HIV感染之方法。