| abstract |
Bi-or tricyclic compounds of formula (I) wherein R1, R4 and R5 are as herein defined, A represents a single or double bond and two R2, R2', R3 and R3' can be joined to form a condensed or spiro ring. These compounds and their pharmaceutical acceptable salt are used in combinations or pharmaceutical compositions and are useful in methods for preventing or treatin human immunodeficiency virus (HIV) infection or in methods for preventing, delaying or treating acquired immunodeficiency syndrome (AIDS). |