{1-[4-(2-methanesulfonylamino-8-pyridin-2-yl-purin-9-yl)-phenyl]-cyclobutyl}-carbamic acid tert-butyl ester

N-(9-(4-(1-aminocyclobutyl)phenyl)-8-(pyridin-2-yl)-9H-purin-2-yl)methanesulfonamide

1-[4-(2,8-diphenyl-purin-9-yl)-phenyl]-cyclobutylamine

{1-[4-(8-phenyl-2-piperazin-1-yl-purin-9-yl)-phenyl]-cyclobutyl}-carbamic acid tert-butyl ester

1-[4-(8-phenyl-2-piperazin-1-yl-purin-9-yl)-phenyl]-cyclobutylamine