Pyrido(3,2-d)pyrimidines useful for treating viral infections

摘要

Pyrido(3,2-d)pyrimidine derivatives represented by the structural formula (I): wherein: R4 is hydrogen, and R1, R2 and R3 together provide a specific substitution pattern, pharmaceutical acceptable addition salts, stereochemical isomeric forms, N-oxides, solvates and pro-drugs thereof, are useful in the treatment of hepatitis C.