Cl[C:2]1[N:10]=[CH:9][N:8]=[C:7]2[C:3]=1[NH:4][C:5](=[O:11])[NH:6]2.[C:12]([O:16][C:17](=[O:25])[NH:18][CH:19]1[CH2:24][CH2:23][NH:22][CH2:21][CH2:20]1)([CH3:15])([CH3:14])[CH3:13]>>[C:12]([O:16][C:17](=[O:25])[NH:18][CH:19]1[CH2:24][CH2:23][N:22]([C:2]2[N:10]=[CH:9][N:8]=[C:7]3[C:3]=2[NH:4][C:5](=[O:11])[NH:6]3)[CH2:21][CH2:20]1)([CH3:15])([CH3:13])[CH3:14]By reacting 6-chloro-7,9-dihydro-purin-8-one with piperidin-4-yl-carbamic acid tert-butyl ester according to the method of Example 4A, the title compound was obtained. LC/MS: (LCT) Rt 5.68 [M+H]+ 335.
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