1	ES4	6-chloro-9h-purine	1.000
2	06K	2,6-bis(chloranyl)-7h-purine	0.909
3	6GU	6-chloroguanine	0.909
4	BCP	2-bromo-6-chloro-purine	0.909
5	CFP	6-chloro-2-fluoropurine	0.909
6	2BP	9h-purin-2-amine	0.818
7	6MP	6-methylpurine	0.818
8	BP1	6-bromo-7h-purine	0.818
9	HPA	Hypoxanthine	0.818
10	PM6	9h-purine-6-thiol	0.818
11	290	6-methyl-3,9-dihydro-2h-purin-2-one	0.750
12	2ON	2-sulfanyl-1,9-dihydro-6h-purin-6-one	0.750
13	3MA	6-amino-3-methylpurine	0.750
14	6AP	9h-purine-2,6-diamine	0.750
15	8G8	2-chloranyl-9-methyl-purine	0.750
16	A2F	2-fluoroadenine	0.750
17	ADK	3-methyl-3h-purin-6-ylamine	0.750
18	ADZ	9-methyl-9h-purin-6-amine	0.750
19	BOA	2-bromo-6-hydroxy-purine	0.750
20	DX4	2-amino-1,9-dihydro-6h-purine-6-thione	0.750
21	GUN	Guanine	0.750
22	HH5	6-iodanyl-7~{H}-purin-2-amine	0.750
23	IGA	6-amino-3,7-dihydro-2h-purin-2-one	0.750
24	KB5	6-azanyl-9~{H}-purine-8-thiol	0.750
25	M1A	6-amino-1-methylpurine	0.750
26	N6M	N-methyl-9h-purin-6-amine	0.750
27	Q88	9h-purine-6,8-diamine	0.750
28	SZL	6-methoxy-9h-purine	0.750
29	XAN	Xanthine	0.750
30	XQG	6-methylsulfanyl-9h-purine	0.750
31	YH7	6-amino-1,9-dihydro-2h-purine-2-thione	0.750
32	WOY	6,7-dihydro-5h-pyrrolo[2,3-D]pyrimidine	0.727