6-amino-7-(4-nitrobenzyl)-7H-purine

4-(6-aminopurin-9-yl)-2-(hydroxymethyl)oxolan-3-ol

9-[(2,6-dichlorophenyl)methyl]purin-6-amine

3-(2,6-Dichloro-benzyl)-3H-purin-6-ylamine

9-(2-chlorophenyl)purin-6-amine