1	CYT	6-aminopyrimidin-2(1h)-one	1.000
2	17E	5-methylcytosine	0.889
3	1LD	5-fluorocytosine	0.889
4	1MC	1-methylcytosine	0.889
5	3MC	3-methylcytosine	0.889
6	6UA	6-aminopyrimidine-2,4(3h,5h)-dione	0.889
7	71O	Pyrimidin-2-ol	0.875
8	L60	1,3-diazinan-2-one	0.875
9	JFD	6-amino-5-bromo-1,2,3,4-tetrahydropyrimidine-2,4-dione	0.800
10	URN	5,6-diaminopyrimidine-2,4(1h,3h)-dione	0.800
11	5AZ	6-amino-1,3,5-triazin-2(1h)-one	0.778
12	8GF	2-methylpyrimidin-4-amine	0.778
13	DJP	5-fluoropyrimidin-2-ol	0.778
14	DUC	Dihydropyrimidine-2,4(1h,3h)-dione	0.778
15	HPY	4-hydroxy-3,4-dihydro-1h-pyrimidin-2-one	0.778
16	LDB	4-thiouracil	0.778
17	LG3	Pyrimidine-2,4-diamine	0.778
18	OS0	4-oxidanyl-3,4-dihydro-1h-pyrimidin-2-one	0.778
19	TI5	5-methylpyrimidin-4-amine	0.778
20	URA	Uracil	0.778
21	P1R	Pyrimidine	0.750
22	1RT	4-amino-2-oxo-1,2-dihydropyrimidine-5-carboxylic acid	0.727
23	IGA	6-amino-3,7-dihydro-2h-purin-2-one	0.727
24	2ZX	6-chloropyrimidine-2,4-diamine	0.700
25	3AY	Pyrimidine-2,4,6-triamine	0.700
26	5UC	5-chloropyrimidine-2,4(1h,3h)-dione	0.700
27	6AM	4,6-diamino-1,3,5-triazin-2-ol	0.700
28	6MU	6-methylpyrimidine-2,4-diol	0.700
29	BR8	Barbituric acid	0.700
30	FPY	(4s)-5-fluoro-4-hydroxy-3,4-dihydropyrimidin-2(1h)-one	0.700
31	ICP	2-methyl-5-methylene-5h-pyrimidin-4-ylideneamine	0.700
32	IDH	(5s)-5-iododihydro-2,4(1h,3h)-pyrimidinedione	0.700
33	IUR	5-iodouracil	0.700
34	ODF	5-oxidanyl-1~{H}-pyrimidine-2,4-dione	0.700
35	PYD	2,5-dimethyl-pyrimidin-4-ylamine	0.700
36	Q4H	4-azanylpyrimidine-5-carbonitrile	0.700
37	TDR	Thymine	0.700
38	URB	5-bromopyrimidine-2,4(1h,3h)-dione	0.700
39	URF	5-fluorouracil	0.700
40	WBU	5-amino-1h-pyrimidine-2,4-dione	0.700
41	XH5	(5s)-5-methyl-1,3-diazinane-2,4-dione	0.700