1	9DA	9-deazaadenine	1.000
2	9HX	9-deazahypoxanthine	0.818
3	ADE	Adenine	0.818
4	1LQ	Quinazolin-4-amine	0.750
5	3MA	6-amino-3-methylpurine	0.750
6	6AP	9h-purine-2,6-diamine	0.750
7	9DG	9-deazaguanine	0.750
8	A2F	2-fluoroadenine	0.750
9	ADK	3-methyl-3h-purin-6-ylamine	0.750
10	ADZ	9-methyl-9h-purin-6-amine	0.750
11	IGA	6-amino-3,7-dihydro-2h-purin-2-one	0.750
12	KB5	6-azanyl-9~{H}-purine-8-thiol	0.750
13	M1A	6-amino-1-methylpurine	0.750
14	P4Q	Pyrido[3,2-D]pyrimidin-4-amine	0.750
15	Q88	9h-purine-6,8-diamine	0.750
16	YH7	6-amino-1,9-dihydro-2h-purine-2-thione	0.750
17	4JP	1h-pyrrolo[3,2-B]pyridine	0.727