1	LDB	4-thiouracil	1.000
2	71O	Pyrimidin-2-ol	0.875
3	L60	1,3-diazinan-2-one	0.875
4	CYT	6-aminopyrimidin-2(1h)-one	0.778
5	DJP	5-fluoropyrimidin-2-ol	0.778
6	DUC	Dihydropyrimidine-2,4(1h,3h)-dione	0.778
7	HPY	4-hydroxy-3,4-dihydro-1h-pyrimidin-2-one	0.778
8	OS0	4-oxidanyl-3,4-dihydro-1h-pyrimidin-2-one	0.778
9	URA	Uracil	0.778
10	P1R	Pyrimidine	0.750
11	17E	5-methylcytosine	0.700
12	1LD	5-fluorocytosine	0.700
13	1MC	1-methylcytosine	0.700
14	3MC	3-methylcytosine	0.700
15	5UC	5-chloropyrimidine-2,4(1h,3h)-dione	0.700
16	6MU	6-methylpyrimidine-2,4-diol	0.700
17	6UA	6-aminopyrimidine-2,4(3h,5h)-dione	0.700
18	BR8	Barbituric acid	0.700
19	FPY	(4s)-5-fluoro-4-hydroxy-3,4-dihydropyrimidin-2(1h)-one	0.700
20	IDH	(5s)-5-iododihydro-2,4(1h,3h)-pyrimidinedione	0.700
21	IUR	5-iodouracil	0.700
22	ODF	5-oxidanyl-1~{H}-pyrimidine-2,4-dione	0.700
23	TDR	Thymine	0.700
24	URB	5-bromopyrimidine-2,4(1h,3h)-dione	0.700
25	URF	5-fluorouracil	0.700
26	V8Q	6-methyl-5-sulfanylidene-2h-1,2,4-triazin-3-one	0.700
27	WBU	5-amino-1h-pyrimidine-2,4-dione	0.700
28	XH5	(5s)-5-methyl-1,3-diazinane-2,4-dione	0.700