1 H64 8-(6-bromo-benzo[1,3]dioxol-5-ylsulfanyl)-9-(3-isopropylamino-propyl)-adenine 1.000 2 H71 8-[(6-iodo-1,3-benzodioxol-5-yl)thio]-9-[3-(isopropylamino)propyl]-9h-purin-6-amine 0.931