9-(7,7-dimethyl-6,8-dioxaspiro[3.5]non-2-yl)-9H-purin-6-amine 9H-purin-6-amine, 9-(7,7-dimethyl-6,8-dioxaspiro[3.5]non-2-yl)- InChI=1/C14H19N5O2/c1-13(2)20-5-14(6-21-13)3-9(4-14)19-8-18-10-11(15)16-7-17-12(10)19/h7-9H,3-6H2,1-2H3,(H2,15,16,17