| abstract |
The invention relates to compounds of formula I in which R, X, X, and A are as defined herein, or pharmaceutically acceptable salts thereof, inhibiting HIV-1 reverse transcriptase, and a method for preventing and treating HIV-1 infection and treating AIDS and / or PSP. In addition, the invention relates to compositions containing compounds of formula I, applicable for the prevention and treatment of infection by HIV-1 and the treatment of AIDS and / or PSP. |