2'-Deoxythioguanosine 2-Amino-9-(2-deoxy-.beta.-D-erythropentofuranosyl)-9H-purine-6(1H)-thione 6-Mercaptoguaninedeoxyriboside 789-61-7 AIDS-010571 AIDS010571 NSC71261 Thiodeoxyguanosine Thioguanine deoxyriboside