1	17E	5-methylcytosine	1.000
2	CYT	6-aminopyrimidin-2(1h)-one	0.889
3	TI5	5-methylpyrimidin-4-amine	0.889
4	1RT	4-amino-2-oxo-1,2-dihydropyrimidine-5-carboxylic acid	0.818
5	1LD	5-fluorocytosine	0.800
6	1MC	1-methylcytosine	0.800
7	3MC	3-methylcytosine	0.800
8	6UA	6-aminopyrimidine-2,4(3h,5h)-dione	0.800
9	ICP	2-methyl-5-methylene-5h-pyrimidin-4-ylideneamine	0.800
10	PYD	2,5-dimethyl-pyrimidin-4-ylamine	0.800
11	Q4H	4-azanylpyrimidine-5-carbonitrile	0.800
12	TDR	Thymine	0.800
13	XH5	(5s)-5-methyl-1,3-diazinane-2,4-dione	0.800
14	71O	Pyrimidin-2-ol	0.778
15	L60	1,3-diazinan-2-one	0.778
16	FYU	2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carbaldehyde	0.727
17	HMH	4-amino-5-hydroxymethyl-2-methylpyrimidine	0.727
18	HMU	5-hydroxymethyl uracil	0.727
19	JFD	6-amino-5-bromo-1,2,3,4-tetrahydropyrimidine-2,4-dione	0.727
20	NSP	5-(aminomethyl)-2-methylpyrimidin-4-amine	0.727
21	URN	5,6-diaminopyrimidine-2,4(1h,3h)-dione	0.727
22	Y3G	5-ethynylpyrimidine-2,4(1h,3h)-dione	0.727
23	5AZ	6-amino-1,3,5-triazin-2(1h)-one	0.700
24	8GF	2-methylpyrimidin-4-amine	0.700
25	93Q	3-methylpyridin-2-amine	0.700
26	DJP	5-fluoropyrimidin-2-ol	0.700
27	DUC	Dihydropyrimidine-2,4(1h,3h)-dione	0.700
28	HPY	4-hydroxy-3,4-dihydro-1h-pyrimidin-2-one	0.700
29	LDB	4-thiouracil	0.700
30	LG3	Pyrimidine-2,4-diamine	0.700
31	OS0	4-oxidanyl-3,4-dihydro-1h-pyrimidin-2-one	0.700
32	URA	Uracil	0.700