8-Bromo-3-methyl-1H-purine-2,6(3H,7H)-dione
4-Chloro-7H-pyrrolo[2,3-d]pyrimidine
4-Chloro-5-iodo-7H-pyrrolo[2,3-d]pyrimidine
6-((1-Methyl-4-nitro-1H-imidazol-5-yl)thio)-9H-purine
1H-Pyrazolo[3,4-d]pyrimidin-4-amine
2-Amino-6-chloropurine
3-Iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine
2-Amino-9-ethyl-1H-purin-6(9H)-one
3-Methyl-3H-purin-6-amine
2,4-Dichloro-7H-pyrrolo[2,3-d]pyrimidine
6-Chloro-9-(tetrahydro-2H-pyran-2-yl)-9H-purine
1H-Pyrazolo[3,4-d]pyrimidin-4(5H)-one
1,7-Dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-one
2-Amino-3,7-dihydro-6H-purine-6-thione
5-Amino-1,4-dihydro-7H-[1,2,3]triazolo[4,5-d]pyrimidin-7-one
6-Chloro-7H-purine
1H-purin-6-amine
