N1-substituted 1H-1,2,3-triazolo[4,5,-D]pyrimidines, a process for their preparation and their use as antiviral agents

摘要

N1-Substituted 1H-1,2,3-triazolo[4,5-d]pyrimidine compounds of the formula I <IMAGE> (I) in which the substituents X, Y, R1, R2 and R3 have the meanings recited in the specification, are described as pharmaceutical compositions containing them and processes for their preparation. The compounds are effective antiviral agents.