1	FYU	2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carbaldehyde	1.000
2	HMU	5-hydroxymethyl uracil	1.000
3	5CU	2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylic acid	0.909
4	TDR	Thymine	0.900
5	XH5	(5s)-5-methyl-1,3-diazinane-2,4-dione	0.900
6	Y3G	5-ethynylpyrimidine-2,4(1h,3h)-dione	0.818
7	DUC	Dihydropyrimidine-2,4(1h,3h)-dione	0.800
8	HPY	4-hydroxy-3,4-dihydro-1h-pyrimidin-2-one	0.800
9	OS0	4-oxidanyl-3,4-dihydro-1h-pyrimidin-2-one	0.800
10	URA	Uracil	0.800
11	1RT	4-amino-2-oxo-1,2-dihydropyrimidine-5-carboxylic acid	0.750
12	IF7	(3s,4s,5r)-5-(hydroxymethyl)-3,4-bis(oxidanyl)piperidin-2-one	0.750
13	IFL	(3s,4r,5r)-3,4-dihydroxy-5-(hydroxymethyl)piperidin-2-one	0.750
14	MNM	(2s,3s,4r,5r)-2,3,4-trihydroxy-5-hydroxymethyl-piperidine	0.750
15	NOY	(2r,3s,4r,5r)-5-(hydroxymethyl)piperidine-2,3,4-triol	0.750
16	17E	5-methylcytosine	0.727
17	5UC	5-chloropyrimidine-2,4(1h,3h)-dione	0.727
18	6MU	6-methylpyrimidine-2,4-diol	0.727
19	6UA	6-aminopyrimidine-2,4(3h,5h)-dione	0.727
20	BR8	Barbituric acid	0.727
21	FPY	(4s)-5-fluoro-4-hydroxy-3,4-dihydropyrimidin-2(1h)-one	0.727
22	IDH	(5s)-5-iododihydro-2,4(1h,3h)-pyrimidinedione	0.727
23	IUR	5-iodouracil	0.727
24	ODF	5-oxidanyl-1~{H}-pyrimidine-2,4-dione	0.727
25	URB	5-bromopyrimidine-2,4(1h,3h)-dione	0.727
26	URF	5-fluorouracil	0.727
27	WBU	5-amino-1h-pyrimidine-2,4-dione	0.727
28	71O	Pyrimidin-2-ol	0.700
29	L60	1,3-diazinan-2-one	0.700