1	H5P	Hydantocidin-5'-phosphate	1.000
2	PYO	1-(beta-D-ribofuranosyl)-pyrimidin-2-one-5'-phosphate	0.773
3	IRN	1-(5-O-phosphono-beta-D-ribofuranosyl)-1h-imidazole	0.762
4	0C	L-cytidine-5'-monophosphate	0.739
5	0U	L-uridine-5'-monophosphate	0.739
6	4SU	4-thiouridine-5'-monophosphate	0.739
7	8XC	4-amino-1-(5-O-phosphono-beta-D-xylofuranosyl)pyrimidin-2(1h)-one	0.739
8	8XU	1-(5-O-phosphono-beta-D-xylofuranosyl)pyrimidine-2,4(1h,3h)-dione	0.739
9	C	Cytidine-5'-monophosphate	0.739
10	C5P	Cytidine-5'-monophosphate	0.739
11	CAR	Cytosine arabinose-5'-phosphate	0.739
12	CH	N3-protonated cytidine-5'-monophosphate	0.739
13	H2U	5,6-dihydrouridine-5'-monophosphate	0.739
14	IY0	[5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3,4-bis(oxidanyl)furan-2-yl]methyl dihydrogen phosphate	0.739
15	RY	5'-3,6-dihydrocytidylic acid	0.739
16	U	Uridine-5'-monophosphate	0.739
17	U5P	Uridine-5'-monophosphate	0.739
18	UAR	Uracil arabinose-5'-phosphate	0.739
19	UP6	6-aza uridine 5'-monophosphate	0.739
20	US5	1-(5-O-phosphono-beta-D-ribofuranosyl)-4-selanylpyrimidin-2(1h)-one	0.739
21	AIR	5-aminoimidazole ribonucleotide	0.727
22	CDW	(4r)-3-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-1,3-diazabicyclo[2.2.0]hex-5-en-2-one	0.727
23	Y5P	1-(5-O-phosphono-beta-D-ribofuranosyl)-1,4-dihydropyrimidine	0.727
24	Z	1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)pyrimidin-2(1h)-one	0.727
25	D33	1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-1h-imidazole	0.714
26	16B	N-hydroxycytidine 5'-(dihydrogen phosphate)	0.708
27	5BU	5-bromo-uridine-5'-monophosphate	0.708
28	5CF	5-fluorocytidine 5'-(dihydrogen phosphate)	0.708
29	5FU	5-fluoro-uridine-5'-monophosphate	0.708
30	5IC	5-iodo-cytidine-5'-monophosphate	0.708
31	5MC	5-methylcytidine-5'-monophosphate	0.708
32	5MU	5-methyluridine 5'-monophosphate	0.708
33	7OK	N-hydroxycytidine 5'-(dihydrogen phosphate) tautomer	0.708
34	A1IT4	1-(beta-D-ribofuranosyl)cyanuric acid-5'-monophosphate	0.708
35	A1L3O	5-hydroxyuridine 5'-phosphate	0.708
36	B8Q	3-methyl, cytidine-5'-monophosphate	0.708
37	B8T	4-methyl, cytidine-5'-monophosphate	0.708
38	BMP	6-hydroxyuridine-5'-phosphate	0.708
39	BMQ	1-(5'-phospho-beta-D-ribofuranosyl)barbituric acid	0.708
40	CBV	5-bromocytidine 5'-(dihydrogen phosphate)	0.708
41	D5D	[(1s)-1-[(2s,3s,4r,5r)-5-[2,4-bis(oxidanylidene)-1,3-diazinan-1-yl]-3,4-bis(oxidanyl)oxolan-2-yl]ethyl] dihydrogen phosphate	0.708
42	IU	5-iodouridine-5'-monophosphate	0.708
43	JMH	3-methylcytidine- 5'-monophosphate	0.708
44	NUP	6-aminouridine 5'-monophosphate	0.708
45	S5P	6-sulfanyluridine-5'-phosphate	0.708
46	TKW	5-hydroxycytidine 5'-(dihydrogen phosphate)	0.708
47	U6M	6-methyluridine 5'-(dihydrogen phosphate)	0.708
48	UR3	3-methyluridine-5'-monophoshate	0.708
49	0NZ	2-deoxy-6-O-phosphono-beta-D-glucopyranose	0.700
50	D6G	2-deoxy-6-O-phosphono-alpha-D-glucopyranose	0.700