1	SZL	6-methoxy-9h-purine	1.000
2	6GO	6-O-methylguanine	0.917
3	WUT	9~{H}-purine	0.818
4	2BP	9h-purin-2-amine	0.750
5	6MP	6-methylpurine	0.750
6	ADE	Adenine	0.750
7	BP1	6-bromo-7h-purine	0.750
8	ES4	6-chloro-9h-purine	0.750
9	HPA	Hypoxanthine	0.750
10	PM6	9h-purine-6-thiol	0.750