1	73W	5'-O-[(dithiophosphono)]cytidine	1.000
2	C2S	Cytidine-5'-dithiophosphorate	0.952
3	1SC	5'-O-thiophosphonocytidine	0.909
4	C7R	2'-deoxy-5'-O-thiophosphonocytidine	0.864
5	C7S	2'-deoxy-5'-O-thiophosphonocytidine	0.864
6	SC	2-deoxy-cytidine-5'-thiophosphorate	0.864
7	0C	L-cytidine-5'-monophosphate	0.826
8	8XC	4-amino-1-(5-O-phosphono-beta-D-xylofuranosyl)pyrimidin-2(1h)-one	0.826
9	C	Cytidine-5'-monophosphate	0.826
10	C5P	Cytidine-5'-monophosphate	0.826
11	CAR	Cytosine arabinose-5'-phosphate	0.826
12	CH	N3-protonated cytidine-5'-monophosphate	0.826
13	IY0	[5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3,4-bis(oxidanyl)furan-2-yl]methyl dihydrogen phosphate	0.826
14	OKN	5'-methyl-2'-deoxycytidine-5'-phosphorothioate	0.826
15	RY	5'-3,6-dihydrocytidylic acid	0.826
16	SSU	Uridine-5'-phosphorothioate	0.826
17	T2S	Thymidine-5'-dithiophosphorate	0.826
18	THS	Thymidine-5'-(dithio)phosphate	0.826
19	U37	Uridine 5'-monothiophosphate	0.826
20	5CF	5-fluorocytidine 5'-(dihydrogen phosphate)	0.792
21	5IC	5-iodo-cytidine-5'-monophosphate	0.792
22	5MC	5-methylcytidine-5'-monophosphate	0.792
23	6OO	2'-O-methyl-5'-O-thiophosphonocytidine	0.792
24	B8Q	3-methyl, cytidine-5'-monophosphate	0.792
25	CBV	5-bromocytidine 5'-(dihydrogen phosphate)	0.792
26	JMH	3-methylcytidine- 5'-monophosphate	0.792
27	OKQ	2'-O-methylcytidine-5'-phosphorothioate	0.792
28	TKW	5-hydroxycytidine 5'-(dihydrogen phosphate)	0.792
29	0DC	2'-deoxy-L-ribo-furanosyl cytosine-5'-monophosphate	0.783
30	CMR	2'-deoxy-cytidine-5'-rp-monomethylphosphonate	0.783
31	DC	2'-deoxycytidine-5'-monophosphate	0.783
32	DCM	2'-deoxycytidine-5'-monophosphate	0.783
33	DNR	2'-deoxy-n3-protonated cytidine-5'-monophosphate	0.783
34	IY9	[5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3-oxidanyl-furan-2-yl]methyl dihydrogen phosphate	0.783
35	O2C	3'-deoxy-cytidine-5'-monophosphate	0.783
36	PYO	1-(beta-D-ribofuranosyl)-pyrimidin-2-one-5'-phosphate	0.783
37	UPS	2'-deoxy-5'-O-thiophosphonouridine	0.783
38	XC	[(2~{R},3~{R},5~{R})-5-(6-azanyl-2-oxidanylidene-4,5-dihydropyrimidin-3-yl)-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate	0.783
39	5HM	5-(hydroxymethyl)cytidine 5'-(dihydrogen phosphate)	0.760
40	ADS	Adenosine-5'-(dithio)phosphate	0.760
41	E3C	3-ethyl, cytidine-5'-monophosphate	0.760
42	MMX	3-ethyl-3,4,5,6-tetrahydrocytidine 5'-(dihydrogen phosphate)	0.760
43	RSQ	5-formylcytidine 5'-(dihydrogen phosphate)	0.760
44	0U	L-uridine-5'-monophosphate	0.750
45	2GF	[(2r,5r)-5-(4-amino-5-chloro-2-oxopyrimidin-1(2h)-yl)-3-oxotetrahydrofuran-2-yl]methyl dihydrogen phosphate	0.750
46	4SU	4-thiouridine-5'-monophosphate	0.750
47	4U3	5-chloro-2'-deoxycytidine 5'-(dihydrogen phosphate)	0.750
48	5CM	5-methyl-2'-deoxy-cytidine-5'-monophosphate	0.750
49	5OC	2'-deoxy-5-hydroxycytidine 5'-(dihydrogen phosphate)	0.750
50	8XU	1-(5-O-phosphono-beta-D-xylofuranosyl)pyrimidine-2,4(1h,3h)-dione	0.750
51	A5M	2'-amine-cytidine-5'-monophosphate	0.750
52	C37	5-fluoro-2'-deoxy-cytidine-5'-monophosphate	0.750
53	C38	5-iodo-2'-deoxy-cytidine-5'-monophosphate	0.750
54	CBR	5-bromo-2'-deoxy-cytidine-5'-monophosphate	0.750
55	CFL	4-amino-1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)pyrimidin-2(1h)-one	0.750
56	CFZ	2'-deoxy-2'-fluorocytidine 5'-(dihydrogen phosphate)	0.750
57	F2T	2'-deoxy-2'-fluoro-5'-O-thiophosphonouridine	0.750
58	H2U	5,6-dihydrouridine-5'-monophosphate	0.750
59	IKS	[(2~{R},3~{S},4~{R},5~{R})-5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3,4-bis(oxidanyl)selenolan-2-yl]methyl dihydrogen phosphate	0.750
60	ME6	[(2r,3s,5r)-5-(4-azanyl-3-methyl-2-oxo-pyrimidin-3-ium-1-yl)-3-hydroxy-oxolan-2-yl]methyl dihydrogen phosphate	0.750
61	MUM	5'-O-(dihydroxyphosphanyl)-5-methyl-5,6-dihydrouridine	0.750
62	OFC	4-amino-1-(2-deoxy-2-fluoro-5-O-phosphono-beta-L-ribofuranosyl)pyrimidin-2(1h)-one	0.750
63	PST	Thymidine-5'-thiophosphate	0.750
64	RSP	4-amino-1-(5-O-phosphono-beta-D-ribofuranosyl)pyrimidine-2(1h)-thione	0.750
65	S4C	4'-thio-4'-deoxy-cytosine-5'-monophosphate	0.750
66	U	Uridine-5'-monophosphate	0.750
67	U48	5-methyl-2'-deoxy-n3-protonated cytidine-5'-monophosphate	0.750
68	U5P	Uridine-5'-monophosphate	0.750
69	UAR	Uracil arabinose-5'-phosphate	0.750
70	UD5	5-fluorouridine	0.750
71	US5	1-(5-O-phosphono-beta-D-ribofuranosyl)-4-selanylpyrimidin-2(1h)-one	0.750
72	DOC	2',3'-dideoxycytidine-5'-monophosphate	0.739
73	Y5P	1-(5-O-phosphono-beta-D-ribofuranosyl)-1,4-dihydropyrimidine	0.739
74	Z	1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)pyrimidin-2(1h)-one	0.739
75	2SG	Guanosine phosphorodithioate	0.731
76	N5M	5-nitrocytidine 5'-(dihydrogen phosphate)	0.731
77	AR3	Cytarabine	0.727
78	CTN	4-amino-1-beta-D-ribofuranosyl-2(1h)-pyrimidinone	0.727
79	I5A	5'-deoxy-5'-iodocytidine	0.727
80	10C	4-amino-1-{2,5-anhydro-4-[(phosphonooxy)methyl]-alpha-L-lyxofuranosyl}pyrimidin-2(1h)-one	0.720
81	16B	N-hydroxycytidine 5'-(dihydrogen phosphate)	0.720
82	5BU	5-bromo-uridine-5'-monophosphate	0.720
83	5FC	5-formyl-2'-deoxy-cytidine-5'-monophosphate	0.720
84	5FU	5-fluoro-uridine-5'-monophosphate	0.720
85	5HC	2'-deoxy-5-(hydroxymethyl)cytidine 5'-(dihydrogen phosphate)	0.720
86	5MU	5-methyluridine 5'-monophosphate	0.720
87	5SE	2'-deoxy-5-(methylselanyl)cytidine 5'-(dihydrogen phosphate)	0.720
88	7OK	N-hydroxycytidine 5'-(dihydrogen phosphate) tautomer	0.720
89	A6C	2-(4-amino-2-oxopyrimidin-1(2h)-yl)-1,5-anhydro-2-deoxy-6-O-phosphono-D-altritol	0.720
90	B8T	4-methyl, cytidine-5'-monophosphate	0.720
91	BMP	6-hydroxyuridine-5'-phosphate	0.720
92	BMQ	1-(5'-phospho-beta-D-ribofuranosyl)barbituric acid	0.720
93	CSL	(D)-2'-methylselenyl-2'-deoxycytidine-5'-phosphate	0.720
94	IU	5-iodouridine-5'-monophosphate	0.720
95	MDQ	2'-deoxy-3-(oxidomethyl)cytidine 5'-(dihydrogen phosphate)	0.720
96	NUP	6-aminouridine 5'-monophosphate	0.720
97	OKT	2'-O-methyluridine-5'-phosphorothioate	0.720
98	OMC	O2'-methylycytidine-5'-monophosphate	0.720
99	S5P	6-sulfanyluridine-5'-phosphate	0.720
100	U6M	6-methyluridine 5'-(dihydrogen phosphate)	0.720
101	U7B	2'-deoxy-2'2'-difluorodeoxycytidine	0.720
102	UR3	3-methyluridine-5'-monophoshate	0.720
103	XE6	4-amino-1-(2-O-methyl-5-O-phosphono-beta-L-ribofuranosyl)pyrimidin-2(1h)-one	0.720
104	3KA	1-(2-deoxy-5-O-phosphono-beta-L-erythro-pentofuranosyl)pyrimidine-2,4(1h,3h)-dione	0.708
105	5NC	5-aza-cytidine-5'monophosphate	0.708
106	5PY	1-(2'-deoxy-5'-O-phosphono-beta-D-erythro-pentofuranosyl)-5-methylpyrimidin-2(1h)-one	0.708
107	8RO	[(2~{R},3~{S},5~{R})-5-(5-methyl-2-oxidanylidene-7-thia-1,3-diazabicyclo[4.1.0]hept-5-en-3-yl)-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphite	0.708
108	9L3	[(2r,3s,5r)-5-(4-azanyl-5-methyl-pyrimidin-1-ium-1-yl)-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate	0.708
109	C42	3'-amino-2'-deoxy-cytidine-5'-monophosphate	0.708
110	C4S	2'-deoxy-4'-thiocytidine 5'-(dihydrogen phosphate)	0.708
111	DDN	3,4-dihydro-2'-deoxyuridine-5'-monophosphate	0.708
112	DU	2'-deoxyuridine-5'-monophosphate	0.708
113	L2B	3'-deoxyuridine-5'-monophosphate	0.708
114	UMC	2'-deoxy-5'-uridylic acid	0.708
115	UMP	2'-deoxyuridine 5'-monophosphate	0.708
116	XY7	1-[2-deoxy-5-O-(dihydroxyphosphanyl)-2-fluoro-beta-L-ribofuranosyl]pyrimidine-2,4(1h,3h)-dione	0.708
117	CDF	4-amino-1-{5-O-[(R)-hydroxy(phosphonooxy)phosphoryl]-alpha-D-arabinofuranosyl}pyrimidin-2(1h)-one	0.704
118	CDP	Cytidine-5'-diphosphate	0.704