Substituted 9-(1 or 3-monoacyloxy or 1,3-diacyloxy-2-propoxymethyl) purines as antiviral agent

摘要

Compounds useful as antiviral agents are defined by the following formula: <IMAGE> (I) and the pharmaceutically acceptable acid addition salts thereof wherein R1 and R2 are both -C(O)R7 wherein R7 is 1-adamantyl; R3 is amino; (a) R6 is hydrogen or amino and R4 together with R5 is a bond; or (b) R5 together with R6 is a keto group and R4 is hydrogen.