1 7XO N2-[4-(4-methylpiperazin-1-yl)phenyl]-n8-phenyl-9-propan-2-yl-purine-2,8-diamine 1.000 2 7XR 9-cyclopentyl-n2-[4-(4-methylpiperazin-1-yl)phenyl]-n8-phenyl-purine-2,8-diamine 0.789 3 7XU 9-cyclohexyl-n2-[4-(4-methylpiperazin-1-yl)phenyl]-n8-phenyl-purine-2,8-diamine 0.769