| abstract |
There are prepared compound of the formulae <IMAGE> <IMAGE> <IMAGE> Where R1 is H, lower alkyl S-, lower alkyl <IMAGE> NH2 or halogen, R2 is OH, lower alkyl S-, halogen, NH2 or SH R is OH, SH, lower alkyl S-, or halogen and R3 is OH, SH, lower alkyl S-, halogen or NH2. The compounds have antiviral and immunomodulating activity. |