1	E7R	1,3-dimethyl-7-propyl-purine-2,6-dione	1.000
2	7UM	3-methyl-7-propyl-purine-2,6-dione	0.938
3	A1BD2	Dyphylline	0.889
4	X0T	7-[(2s)-2,3-dihydroxypropyl]-1,3-dimethyl-3,7-dihydro-1h-purine-2,6-dione	0.889
5	A1IOQ	7-(2-chloroethyl)-1,3-dimethyl-purine-2,6-dione	0.882
6	CFF	Caffeine	0.875
7	M1D	4-(1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-7h-purin-7-yl)butanoic acid	0.842
8	EXU	1,3,7-trimethyl-9h-purine-2,6,8-trione	0.824
9	37T	Theobromine	0.812
10	TEP	Theophylline	0.812
11	209	8-amino-1,3-dimethyl-3,7-dihydropurine-2,6-dione	0.765
12	H33	8-chloro-1,3-dimethyl-3,7-dihydro-1h-purine-2,6-dione	0.765
13	I7U	3-methyl-7~{H}-purine-2,6-dione	0.750
14	J6F	7-hexyl-3-methyl-8-sulfanylidene-9h-purine-2,6-dione	0.750
15	POY	3-methyl-1-(5-oxohexyl)-7-propyl-3,7-dihydro-1h-purine-2,6-dione	0.727