1	C2S	Cytidine-5'-dithiophosphorate	1.000
2	73W	5'-O-[(dithiophosphono)]cytidine	0.952
3	C7R	2'-deoxy-5'-O-thiophosphonocytidine	0.905
4	C7S	2'-deoxy-5'-O-thiophosphonocytidine	0.905
5	SC	2-deoxy-cytidine-5'-thiophosphorate	0.905
6	1SC	5'-O-thiophosphonocytidine	0.864
7	OKN	5'-methyl-2'-deoxycytidine-5'-phosphorothioate	0.864
8	T2S	Thymidine-5'-dithiophosphorate	0.864
9	THS	Thymidine-5'-(dithio)phosphate	0.864
10	6OO	2'-O-methyl-5'-O-thiophosphonocytidine	0.826
11	OKQ	2'-O-methylcytidine-5'-phosphorothioate	0.826
12	0DC	2'-deoxy-L-ribo-furanosyl cytosine-5'-monophosphate	0.818
13	CMR	2'-deoxy-cytidine-5'-rp-monomethylphosphonate	0.818
14	DC	2'-deoxycytidine-5'-monophosphate	0.818
15	DCM	2'-deoxycytidine-5'-monophosphate	0.818
16	DNR	2'-deoxy-n3-protonated cytidine-5'-monophosphate	0.818
17	IY9	[5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3-oxidanyl-furan-2-yl]methyl dihydrogen phosphate	0.818
18	UPS	2'-deoxy-5'-O-thiophosphonouridine	0.818
19	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	0.818
20	0C	L-cytidine-5'-monophosphate	0.783
21	2GF	[(2r,5r)-5-(4-amino-5-chloro-2-oxopyrimidin-1(2h)-yl)-3-oxotetrahydrofuran-2-yl]methyl dihydrogen phosphate	0.783
22	4U3	5-chloro-2'-deoxycytidine 5'-(dihydrogen phosphate)	0.783
23	5CM	5-methyl-2'-deoxy-cytidine-5'-monophosphate	0.783
24	5OC	2'-deoxy-5-hydroxycytidine 5'-(dihydrogen phosphate)	0.783
25	8XC	4-amino-1-(5-O-phosphono-beta-D-xylofuranosyl)pyrimidin-2(1h)-one	0.783
26	A5M	2'-amine-cytidine-5'-monophosphate	0.783
27	C	Cytidine-5'-monophosphate	0.783
28	C37	5-fluoro-2'-deoxy-cytidine-5'-monophosphate	0.783
29	C38	5-iodo-2'-deoxy-cytidine-5'-monophosphate	0.783
30	C5P	Cytidine-5'-monophosphate	0.783
31	CAR	Cytosine arabinose-5'-phosphate	0.783
32	CBR	5-bromo-2'-deoxy-cytidine-5'-monophosphate	0.783
33	CFL	4-amino-1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)pyrimidin-2(1h)-one	0.783
34	CFZ	2'-deoxy-2'-fluorocytidine 5'-(dihydrogen phosphate)	0.783
35	CH	N3-protonated cytidine-5'-monophosphate	0.783
36	F2T	2'-deoxy-2'-fluoro-5'-O-thiophosphonouridine	0.783
37	IY0	[5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3,4-bis(oxidanyl)furan-2-yl]methyl dihydrogen phosphate	0.783
38	ME6	[(2r,3s,5r)-5-(4-azanyl-3-methyl-2-oxo-pyrimidin-3-ium-1-yl)-3-hydroxy-oxolan-2-yl]methyl dihydrogen phosphate	0.783
39	OFC	4-amino-1-(2-deoxy-2-fluoro-5-O-phosphono-beta-L-ribofuranosyl)pyrimidin-2(1h)-one	0.783
40	PST	Thymidine-5'-thiophosphate	0.783
41	RY	5'-3,6-dihydrocytidylic acid	0.783
42	SSU	Uridine-5'-phosphorothioate	0.783
43	U37	Uridine 5'-monothiophosphate	0.783
44	U48	5-methyl-2'-deoxy-n3-protonated cytidine-5'-monophosphate	0.783
45	DOC	2',3'-dideoxycytidine-5'-monophosphate	0.773
46	Z	1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)pyrimidin-2(1h)-one	0.773
47	10C	4-amino-1-{2,5-anhydro-4-[(phosphonooxy)methyl]-alpha-L-lyxofuranosyl}pyrimidin-2(1h)-one	0.750
48	5CF	5-fluorocytidine 5'-(dihydrogen phosphate)	0.750
49	5FC	5-formyl-2'-deoxy-cytidine-5'-monophosphate	0.750
50	5HC	2'-deoxy-5-(hydroxymethyl)cytidine 5'-(dihydrogen phosphate)	0.750
51	5IC	5-iodo-cytidine-5'-monophosphate	0.750
52	5MC	5-methylcytidine-5'-monophosphate	0.750
53	5SE	2'-deoxy-5-(methylselanyl)cytidine 5'-(dihydrogen phosphate)	0.750
54	B8Q	3-methyl, cytidine-5'-monophosphate	0.750
55	CBV	5-bromocytidine 5'-(dihydrogen phosphate)	0.750
56	CSL	(D)-2'-methylselenyl-2'-deoxycytidine-5'-phosphate	0.750
57	JMH	3-methylcytidine- 5'-monophosphate	0.750
58	MDQ	2'-deoxy-3-(oxidomethyl)cytidine 5'-(dihydrogen phosphate)	0.750
59	OKT	2'-O-methyluridine-5'-phosphorothioate	0.750
60	OMC	O2'-methylycytidine-5'-monophosphate	0.750
61	TKW	5-hydroxycytidine 5'-(dihydrogen phosphate)	0.750
62	U7B	2'-deoxy-2'2'-difluorodeoxycytidine	0.750
63	XE6	4-amino-1-(2-O-methyl-5-O-phosphono-beta-L-ribofuranosyl)pyrimidin-2(1h)-one	0.750
64	3KA	1-(2-deoxy-5-O-phosphono-beta-L-erythro-pentofuranosyl)pyrimidine-2,4(1h,3h)-dione	0.739
65	5NC	5-aza-cytidine-5'monophosphate	0.739
66	5PY	1-(2'-deoxy-5'-O-phosphono-beta-D-erythro-pentofuranosyl)-5-methylpyrimidin-2(1h)-one	0.739
67	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	0.739
68	9L3	[(2r,3s,5r)-5-(4-azanyl-5-methyl-pyrimidin-1-ium-1-yl)-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate	0.739
69	C42	3'-amino-2'-deoxy-cytidine-5'-monophosphate	0.739
70	C4S	2'-deoxy-4'-thiocytidine 5'-(dihydrogen phosphate)	0.739
71	DDN	3,4-dihydro-2'-deoxyuridine-5'-monophosphate	0.739
72	DU	2'-deoxyuridine-5'-monophosphate	0.739
73	O2C	3'-deoxy-cytidine-5'-monophosphate	0.739
74	PYO	1-(beta-D-ribofuranosyl)-pyrimidin-2-one-5'-phosphate	0.739
75	UMC	2'-deoxy-5'-uridylic acid	0.739
76	UMP	2'-deoxyuridine 5'-monophosphate	0.739
77	XY7	1-[2-deoxy-5-O-(dihydroxyphosphanyl)-2-fluoro-beta-L-ribofuranosyl]pyrimidine-2,4(1h,3h)-dione	0.739
78	1CC	5-carboxy-2'-deoxycytidine monophosphate	0.720
79	5HM	5-(hydroxymethyl)cytidine 5'-(dihydrogen phosphate)	0.720
80	5PC	5(1-propynyl)-2'-deoxycytidine-5'-monophosphate	0.720
81	ADS	Adenosine-5'-(dithio)phosphate	0.720
82	C36	5-methyl-5-fluoro-2'-deoxy-cytidine-5'-monophosphate	0.720
83	C49	4-thio,5-fluoro,5-methyl-2'-deoxy-cytidine-5'-monophosphate	0.720
84	CX2	2'-deoxy-5'-O-{(R)-hydroxy[(2-sulfanylethyl)amino]phosphoryl}cytidine	0.720
85	E3C	3-ethyl, cytidine-5'-monophosphate	0.720
86	EIX	[(2r,3s,5s)-5-[(4r,5r)-6-azanyl-5-fluoranyl-5-methyl-2-oxidanylidene-4-sulfanyl-4h-pyrimidin-3-yl]-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate	0.720
87	G2S	Guanosine-5'-dithiophosphorate	0.720
88	JMC	[(2~{R},3~{R},4~{R},5~{R})-5-(4-azanyl-3-methyl-2-oxidanylidene-4~{H}-pyrimidin-1-yl)-4-methoxy-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate	0.720
89	KEA	2'-azido-2'-deoxycytidine 5'-(dihydrogen phosphate)	0.720
90	LCC	[(1r,3r,4r,7s)-7-hydroxy-3-(5-methylcytosin-1-yl)-2,5-dioxabicyclo[2.2.1]hept-1-yl]methyl dihydrogen phosphate	0.720
91	MMX	3-ethyl-3,4,5,6-tetrahydrocytidine 5'-(dihydrogen phosphate)	0.720
92	RSQ	5-formylcytidine 5'-(dihydrogen phosphate)	0.720
93	XFC	4-amino-1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)-2-oxo-1,2-dihydropyrimidine-5-carbaldehyde	0.720
94	DCZ	2'-deoxycytidine	0.714
95	LDC	4-amino-1-(2-deoxy-beta-L-erythro-pentofuranosyl)pyrimidin-2(1h)-one	0.714
96	0DT	2'-deoxy-L-ribo-furanosyl thymidine-5'-monophosphate	0.708
97	0U	L-uridine-5'-monophosphate	0.708
98	2AU	2'-aminouridine	0.708
99	4SC	2'-deoxy-5-methyl-4'-thiocytidine 5'-(dihydrogen phosphate)	0.708
100	4SU	4-thiouridine-5'-monophosphate	0.708
101	5IU	5-iodo-2'-deoxyuridine-5'-monophosphate	0.708
102	6HC	1',5'-anhydro-2',3'-dideoxy-2'-(cytosin-1-yl)-6'-O-phosphoryl-D-arabino-hexitol	0.708
103	7K8	[(2~{R},3~{S},5~{R})-5-[(4~{E})-4-hydroxyimino-2-oxidanylidene-1,3-diazinan-1-yl]-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate	0.708
104	8XU	1-(5-O-phosphono-beta-D-xylofuranosyl)pyrimidine-2,4(1h,3h)-dione	0.708
105	BRU	5-bromo-2'-deoxyuridine-5'-monophosphate	0.708
106	C34	N4-methyl-2'-deoxy-cytidine-5'-monophosphate	0.708
107	DT	Thymidine-5'-monophosphate	0.708
108	EW3	[(2~{R},3~{R},4~{R},5~{R})-5-[2,4-bis(oxidanylidene)-1,3-diazinan-1-yl]-4-fluoranyl-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate	0.708
109	H2U	5,6-dihydrouridine-5'-monophosphate	0.708
110	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	0.708
111	MDK	4-amino-1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-3-methylpyridin-2(1h)-one	0.708
112	MUM	5'-O-(dihydroxyphosphanyl)-5-methyl-5,6-dihydrouridine	0.708
113	NOH	2'-deoxy-N-hydroxycytidine 5'-(dihydrogen phosphate)	0.708
114	OHU	2'-deoxy-5-hydroxyuridine 5'-(dihydrogen phosphate)	0.708
115	PBT	[3-hydroxy-5-(5-methyl-2,4-dioxotetrahydro-1(2h)-pyrimidinyl)tetrahydro-2-furanyl]methyl dihydrogen phosphate	0.708
116	QBT	[(2r,3s,5r)-3-hydroxy-5-[(5s)-5-methyl-2,4-dioxo-1,3-diazinan-1-yl]oxolan-2-yl]methyl dihydrogen phosphate	0.708
117	RSP	4-amino-1-(5-O-phosphono-beta-D-ribofuranosyl)pyrimidine-2(1h)-thione	0.708
118	S4C	4'-thio-4'-deoxy-cytosine-5'-monophosphate	0.708
119	T4S	1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-4-hydroseleno-5-methylpyrimidin-2(1h)-one	0.708
120	TJU	[(2~{R},3~{S},5~{R})-5-(4-azanyl-3-methyl-6-oxidanylidene-2~{H}-1,3,5-triazin-1-yl)-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphite	0.708
121	TMP	Thymidine-5'-phosphate	0.708
122	TTI	2'-deoxy-5-telluroxouridine 5'-(dihydrogen phosphate)	0.708
123	U	Uridine-5'-monophosphate	0.708
124	U5P	Uridine-5'-monophosphate	0.708
125	UAR	Uracil arabinose-5'-phosphate	0.708
126	UCL	5-chloro-2'-deoxyuridine 5'-(dihydrogen phosphate)	0.708
127	UD5	5-fluorouridine	0.708
128	UF2	1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)pyrimidine-2,4(1h,3h)-dione	0.708
129	UFP	5-fluoro-2'-deoxyuridine-5'-monophosphate	0.708
130	UFT	2'-deoxy-2'-fluorouridine 5'-(dihydrogen phosphate)	0.708
131	US5	1-(5-O-phosphono-beta-D-ribofuranosyl)-4-selanylpyrimidin-2(1h)-one	0.708
132	XCL	[(1s,4r,6r)-6-hydroxy-4-(cytosin-9-yl)cyclohex-2-en-1-yl]methyl dihydrogen phosphate	0.708
133	XCR	[(1r,4s,6s)-4-(4-amino-2-oxopyrimidin-1(2h)-yl)-6-hydroxycyclohex-2-en-1-yl]methyl dihydrogen phosphate	0.708
134	N7X	5'-O-[(R)-hydroxy(sulfanylidene)-lambda~5~-phosphanyl]-2'-O-(2-methoxyethyl)-5-methylcytidine	0.704