tert-butyl 1-(4-(2-methoxy-8-phenyl-9H-purin-9-yl)phenyl)cyclobutylcarbamate

1-(4-(2-methoxy-8-phenyl-9H-purin-9-yl)phenyl)cyclobutanamine

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

1-{9-[4-(1-amino-cyclobutyl)-phenyl]-8-phenyl-9H-purin-2-yl}-pyrrolidin-2-one

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