Phosphonomethylthio-alkoseypureine derivatives, intermediate products for their preparation and pharmaceutical compositions containing them
申请人:BEECHAM GROUP PLC
公开号:EP0399743A1
公开(公告)日:1990-11-28
Compounds of formula (I), and pharmaceutically acceptable salts thereof:
wherein
R₁ is hydroxy or amino;
R₂ is hydrogen or amino;
R₃ is hydrogen, hydroxymethyl or acyloxymethyl;
R₄ is a group of formula:
wherein
R₅ and R₆ are independently selected from hydrogen, C₁₋₆ alkyl and optionally substituted phenyl; or
R₃ and R₄ together are:
wherein
R₆ is as defined above;
having antiviral activity, processes for their preparation and their pharmaceutical use.