Derivatives-hydroxyethylamino sulfamic acid useful as retroviral protease inhibitors.

Acid compounds HIDROXIAMINOETILSULFAMICO of formulas (I) and (II), wherein R, R ', R1, R1' ', R1 ", R2, R3, R4, R5, R6, X, T, Y, P1 and P2 are as defined in claims 1 and 97, effective as retroviral pROTEASE INHIBITORS IN PARTICULAR AS INHIBITORS HIV protease.