ANTIUIRAL 8-AMINO-PURINES AND 1,2,3-TRIAZOLO 4,5-D PYRIMIDINE DERIVATIVES

摘要

Compounds of formula (I) (wherein A represents a grouping; R1 represents a hydrogen or halogen (e.g. chlorine or bromine) atom or a hydroxy or amino group, R2 represents a hydrogen atom or a C1-4 alkyl (e.g. methyl) group, X represents an oxygen or sulphur group and m and n are each 0 or 1 provided that m+n=1) and physiologically acceptable salts and esters thereof, have been found to have potent antiviral activity particularly against herpes infections.