1	EXU	1,3,7-trimethyl-9h-purine-2,6,8-trione	1.000
2	CFF	Caffeine	0.933
3	37T	Theobromine	0.867
4	TEP	Theophylline	0.867
5	A1IOQ	7-(2-chloroethyl)-1,3-dimethyl-purine-2,6-dione	0.824
6	E7R	1,3-dimethyl-7-propyl-purine-2,6-dione	0.824
7	209	8-amino-1,3-dimethyl-3,7-dihydropurine-2,6-dione	0.812
8	H33	8-chloro-1,3-dimethyl-3,7-dihydro-1h-purine-2,6-dione	0.812
9	8HX	8-hydroxy-3,9-dihydro-1h-purine-2,6-dione	0.800
10	I7U	3-methyl-7~{H}-purine-2,6-dione	0.800
11	URC	Uric acid	0.800
12	7UM	3-methyl-7-propyl-purine-2,6-dione	0.765
13	MUA	9-methyl uric acid	0.750
14	A1BD2	Dyphylline	0.737
15	X0T	7-[(2s)-2,3-dihydroxypropyl]-1,3-dimethyl-3,7-dihydro-1h-purine-2,6-dione	0.737
16	XAN	Xanthine	0.733
17	IBM	3-isobutyl-1-methylxanthine	0.722
18	A1BD3	Enprofylline	0.706
19	IUP	5-(hydro)peroxoisourate	0.706
20	7UH	Doxofylline	0.700
21	M1D	4-(1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-7h-purin-7-yl)butanoic acid	0.700
22	QOK	7-(2-methoxyethoxymethyl)-1,3-dimethyl-purine-2,6-dione	0.700