1	6UA	6-aminopyrimidine-2,4(3h,5h)-dione	1.000
2	JFD	6-amino-5-bromo-1,2,3,4-tetrahydropyrimidine-2,4-dione	0.900
3	URN	5,6-diaminopyrimidine-2,4(1h,3h)-dione	0.900
4	CYT	6-aminopyrimidin-2(1h)-one	0.889
5	DUC	Dihydropyrimidine-2,4(1h,3h)-dione	0.889
6	HPY	4-hydroxy-3,4-dihydro-1h-pyrimidin-2-one	0.889
7	OS0	4-oxidanyl-3,4-dihydro-1h-pyrimidin-2-one	0.889
8	URA	Uracil	0.889
9	17E	5-methylcytosine	0.800
10	1LD	5-fluorocytosine	0.800
11	1MC	1-methylcytosine	0.800
12	3MC	3-methylcytosine	0.800
13	5UC	5-chloropyrimidine-2,4(1h,3h)-dione	0.800
14	6MU	6-methylpyrimidine-2,4-diol	0.800
15	BR8	Barbituric acid	0.800
16	FPY	(4s)-5-fluoro-4-hydroxy-3,4-dihydropyrimidin-2(1h)-one	0.800
17	IDH	(5s)-5-iododihydro-2,4(1h,3h)-pyrimidinedione	0.800
18	IUR	5-iodouracil	0.800
19	ODF	5-oxidanyl-1~{H}-pyrimidine-2,4-dione	0.800
20	TDR	Thymine	0.800
21	URB	5-bromopyrimidine-2,4(1h,3h)-dione	0.800
22	URF	5-fluorouracil	0.800
23	WBU	5-amino-1h-pyrimidine-2,4-dione	0.800
24	XH5	(5s)-5-methyl-1,3-diazinane-2,4-dione	0.800
25	71O	Pyrimidin-2-ol	0.778
26	L60	1,3-diazinan-2-one	0.778
27	0FU	2,5,6-triaminopyrimidin-4-ol	0.727
28	FOU	(5s,6r)-5-fluoro-6-hydroxydihydropyrimidine-2,4(1h,3h)-dione	0.727
29	FYU	2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carbaldehyde	0.727
30	HMU	5-hydroxymethyl uracil	0.727
31	I3V	5-azanyl-6-methyl-1~{H}-pyrimidine-2,4-dione	0.727
32	I6R	6-ethyl-1h-pyrimidine-2,4-dione	0.727
33	IGX	6-methoxy-1h-pyrimidine-2,4-dione	0.727
34	LXN	Alloxan	0.727
35	S76	6-(methylamino)-1h-pyrimidine-2,4-dione	0.727
36	W8W	5-bromo-1-methylpyrimidine-2,4(1h,3h)-dione	0.727
37	Y3G	5-ethynylpyrimidine-2,4(1h,3h)-dione	0.727
38	5AZ	6-amino-1,3,5-triazin-2(1h)-one	0.700
39	8GF	2-methylpyrimidin-4-amine	0.700
40	9UZ	Piperidine-2,6-dione	0.700
41	DJP	5-fluoropyrimidin-2-ol	0.700
42	LDB	4-thiouracil	0.700
43	LG3	Pyrimidine-2,4-diamine	0.700
44	TI5	5-methylpyrimidin-4-amine	0.700
45	TUL	2-thioxo-2,3-dihydropyrimidin-4(1h)-one	0.700