tert-butyl 1-(4-(5-amino-2-chloropyrimidin-4-ylamino)-phenyl)cyclobutylcarbamate

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

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

(1-{4-[8-(2-methyl-2H-pyrazol-3-yl)-2-(3-trifluoromethoxy-phenyl)-purin-9-yl]-phenyl}-cyclobutyl)-carbamic acid tert-butyl ester

1-(4-(8-(1-methyl-1H-pyrazol-5-yl)-2-(3-(trifluoromethoxy)phenyl)-9H-purin-9-yl)phenyl)cyclobutanamine