1	M1A	6-amino-1-methylpurine	1.000
2	ADE	Adenine	0.909
3	3MA	6-amino-3-methylpurine	0.833
4	6AP	9h-purine-2,6-diamine	0.833
5	A2F	2-fluoroadenine	0.833
6	ADK	3-methyl-3h-purin-6-ylamine	0.833
7	ADZ	9-methyl-9h-purin-6-amine	0.833
8	IGA	6-amino-3,7-dihydro-2h-purin-2-one	0.833
9	KB5	6-azanyl-9~{H}-purine-8-thiol	0.833
10	Q88	9h-purine-6,8-diamine	0.833
11	YH7	6-amino-1,9-dihydro-2h-purine-2-thione	0.833
12	2EC	9-ethyl-9h-purin-6-ylamine	0.769
13	39A	6-amino-3,9-dimethyl-9h-purin-3-ium	0.769
14	8WT	8-methylsulfanyl-7~{H}-purin-6-amine	0.769
15	W5M	9-methyl-9h-purine-2,6-diamine	0.769
16	2BP	9h-purin-2-amine	0.750
17	6MP	6-methylpurine	0.750
18	9DA	9-deazaadenine	0.750
19	BP1	6-bromo-7h-purine	0.750
20	ES4	6-chloro-9h-purine	0.750
21	HPA	Hypoxanthine	0.750
22	PM6	9h-purine-6-thiol	0.750
23	JXN	8-bromanyl-9-ethyl-purin-6-amine	0.714
24	JY8	9-ethyl-8-methyl-purin-6-amine	0.714
25	TEP	Theophylline	0.714