1	6OO	2'-O-methyl-5'-O-thiophosphonocytidine	1.000
2	OKQ	2'-O-methylcytidine-5'-phosphorothioate	1.000
3	OKT	2'-O-methyluridine-5'-phosphorothioate	0.913
4	OMC	O2'-methylycytidine-5'-monophosphate	0.913
5	XE6	4-amino-1-(2-O-methyl-5-O-phosphono-beta-L-ribofuranosyl)pyrimidin-2(1h)-one	0.913
6	C7R	2'-deoxy-5'-O-thiophosphonocytidine	0.909
7	C7S	2'-deoxy-5'-O-thiophosphonocytidine	0.909
8	SC	2-deoxy-cytidine-5'-thiophosphorate	0.909
9	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	0.875
10	M5Q	[(1s)-1-[(2s,3r,4r,5r)-5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-4-methoxy-3-oxidanyl-oxolan-2-yl]ethyl] dihydrogen phosphate	0.875
11	1SC	5'-O-thiophosphonocytidine	0.870
12	OKN	5'-methyl-2'-deoxycytidine-5'-phosphorothioate	0.870
13	N7X	5'-O-[(R)-hydroxy(sulfanylidene)-lambda~5~-phosphanyl]-2'-O-(2-methoxyethyl)-5-methylcytidine	0.846
14	QSK	[(2~{R},3~{R},4~{R},5~{R})-5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3-oxidanyl-4-(trifluoromethyloxy)oxolan-2-yl]methoxyphosphinic acid	0.840
15	A1L9Q	4-azanyl-1-[(2~{R},3~{R},4~{R},5~{R})-3-methoxy-4-oxidanyl-5-[[tris(oxidanyl)-$L^{5}-phosphanyl]oxymethyl]oxolan-2-yl]pyrimidine-2-thione	0.833
16	OMU	O2'-methyluridine 5'-monophosphate	0.833
17	XEC	1-(2-O-methyl-5-O-phosphono-beta-L-ribofuranosyl)pyrimidine-2,4(1h,3h)-dione	0.833
18	0DC	2'-deoxy-L-ribo-furanosyl cytosine-5'-monophosphate	0.826
19	C2S	Cytidine-5'-dithiophosphorate	0.826
20	CMR	2'-deoxy-cytidine-5'-rp-monomethylphosphonate	0.826
21	DC	2'-deoxycytidine-5'-monophosphate	0.826
22	DCM	2'-deoxycytidine-5'-monophosphate	0.826
23	DNR	2'-deoxy-n3-protonated cytidine-5'-monophosphate	0.826
24	IY9	[5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3-oxidanyl-furan-2-yl]methyl dihydrogen phosphate	0.826
25	UPS	2'-deoxy-5'-O-thiophosphonouridine	0.826
26	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	0.826
27	B9H	2'-methyl, 3-propyl, cytidine-5'-monophosphate	0.808
28	C31	2'-O-3-aminopropyl cytidine-5'-monophosphate	0.808
29	C43	2'-O-methyoxyethyl-cytidine-5'-monophosphate	0.808
30	2MU	2',5-dimethyluridine-5'-monophosphate	0.800
31	4OC	4n,o2'-methylcytidine-5'-monophosphate	0.800
32	A1IC1	[(2~{R},3~{R},4~{R},5~{R})-4-methoxy-5-[3-methyl-2,4-bis(oxidanylidene)pyrimidin-1-yl]-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphite	0.800
33	T41	1-(2-O-methyl-beta-D-arabinofuranosyl)thymidine 5'-monophosphate	0.800
34	0C	L-cytidine-5'-monophosphate	0.792
35	2GF	[(2r,5r)-5-(4-amino-5-chloro-2-oxopyrimidin-1(2h)-yl)-3-oxotetrahydrofuran-2-yl]methyl dihydrogen phosphate	0.792
36	4U3	5-chloro-2'-deoxycytidine 5'-(dihydrogen phosphate)	0.792
37	5CM	5-methyl-2'-deoxy-cytidine-5'-monophosphate	0.792
38	5OC	2'-deoxy-5-hydroxycytidine 5'-(dihydrogen phosphate)	0.792
39	73W	5'-O-[(dithiophosphono)]cytidine	0.792
40	8XC	4-amino-1-(5-O-phosphono-beta-D-xylofuranosyl)pyrimidin-2(1h)-one	0.792
41	A5M	2'-amine-cytidine-5'-monophosphate	0.792
42	C	Cytidine-5'-monophosphate	0.792
43	C37	5-fluoro-2'-deoxy-cytidine-5'-monophosphate	0.792
44	C38	5-iodo-2'-deoxy-cytidine-5'-monophosphate	0.792
45	C5P	Cytidine-5'-monophosphate	0.792
46	CAR	Cytosine arabinose-5'-phosphate	0.792
47	CBR	5-bromo-2'-deoxy-cytidine-5'-monophosphate	0.792
48	CFL	4-amino-1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)pyrimidin-2(1h)-one	0.792
49	CFZ	2'-deoxy-2'-fluorocytidine 5'-(dihydrogen phosphate)	0.792
50	CH	N3-protonated cytidine-5'-monophosphate	0.792
51	F2T	2'-deoxy-2'-fluoro-5'-O-thiophosphonouridine	0.792
52	IY0	[5-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3,4-bis(oxidanyl)furan-2-yl]methyl dihydrogen phosphate	0.792
53	ME6	[(2r,3s,5r)-5-(4-azanyl-3-methyl-2-oxo-pyrimidin-3-ium-1-yl)-3-hydroxy-oxolan-2-yl]methyl dihydrogen phosphate	0.792
54	OFC	4-amino-1-(2-deoxy-2-fluoro-5-O-phosphono-beta-L-ribofuranosyl)pyrimidin-2(1h)-one	0.792
55	PST	Thymidine-5'-thiophosphate	0.792
56	RY	5'-3,6-dihydrocytidylic acid	0.792
57	SSU	Uridine-5'-phosphorothioate	0.792
58	U37	Uridine 5'-monothiophosphate	0.792
59	U48	5-methyl-2'-deoxy-n3-protonated cytidine-5'-monophosphate	0.792
60	DOC	2',3'-dideoxycytidine-5'-monophosphate	0.783
61	Z	1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)pyrimidin-2(1h)-one	0.783
62	C5L	2'-O-(2-methoxyethyl)-5-methylcytidine 5'-(dihydrogen phosphate)	0.778
63	6NW	2'-O-methyl-5'-O-thiophosphonoadenosine	0.769
64	UOA	[(2r,3s,4r,5r)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-3-hydroxy-2,4-dimethoxytetrahydrofuran-2-yl]methyl dihydrogen phosphate (non-preferred name)	0.769
65	UOB	2'-ome,4'beta-ome uridine 5'-(dihydrogen phosphate)	0.769
66	10C	4-amino-1-{2,5-anhydro-4-[(phosphonooxy)methyl]-alpha-L-lyxofuranosyl}pyrimidin-2(1h)-one	0.760
67	5CF	5-fluorocytidine 5'-(dihydrogen phosphate)	0.760
68	5FC	5-formyl-2'-deoxy-cytidine-5'-monophosphate	0.760
69	5HC	2'-deoxy-5-(hydroxymethyl)cytidine 5'-(dihydrogen phosphate)	0.760
70	5IC	5-iodo-cytidine-5'-monophosphate	0.760
71	5MC	5-methylcytidine-5'-monophosphate	0.760
72	5SE	2'-deoxy-5-(methylselanyl)cytidine 5'-(dihydrogen phosphate)	0.760
73	A1BT7	2'-deoxy-5-fluoro-5-methyl-5,6-dihydrocytidine 5'-(dihydrogen phosphate)	0.760
74	A1L82	[(2~{R},3~{S},5~{R})-5-[(2~{R},4~{R},5~{S})-4-azanyl-5-fluoranyl-5-methyl-2-oxidanyl-1,3-diazinan-1-yl]-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate	0.760
75	B8Q	3-methyl, cytidine-5'-monophosphate	0.760
76	CBV	5-bromocytidine 5'-(dihydrogen phosphate)	0.760
77	CSL	(D)-2'-methylselenyl-2'-deoxycytidine-5'-phosphate	0.760
78	JMH	3-methylcytidine- 5'-monophosphate	0.760
79	MDQ	2'-deoxy-3-(oxidomethyl)cytidine 5'-(dihydrogen phosphate)	0.760
80	TKW	5-hydroxycytidine 5'-(dihydrogen phosphate)	0.760
81	U7B	2'-deoxy-2'2'-difluorodeoxycytidine	0.760
82	3KA	1-(2-deoxy-5-O-phosphono-beta-L-erythro-pentofuranosyl)pyrimidine-2,4(1h,3h)-dione	0.750
83	5NC	5-aza-cytidine-5'monophosphate	0.750
84	5PY	1-(2'-deoxy-5'-O-phosphono-beta-D-erythro-pentofuranosyl)-5-methylpyrimidin-2(1h)-one	0.750
85	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	0.750
86	9L3	[(2r,3s,5r)-5-(4-azanyl-5-methyl-pyrimidin-1-ium-1-yl)-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate	0.750
87	C42	3'-amino-2'-deoxy-cytidine-5'-monophosphate	0.750
88	C4S	2'-deoxy-4'-thiocytidine 5'-(dihydrogen phosphate)	0.750
89	DDN	3,4-dihydro-2'-deoxyuridine-5'-monophosphate	0.750
90	DU	2'-deoxyuridine-5'-monophosphate	0.750
91	O2C	3'-deoxy-cytidine-5'-monophosphate	0.750
92	PYO	1-(beta-D-ribofuranosyl)-pyrimidin-2-one-5'-phosphate	0.750
93	UMC	2'-deoxy-5'-uridylic acid	0.750
94	UMP	2'-deoxyuridine 5'-monophosphate	0.750
95	XY7	1-[2-deoxy-5-O-(dihydroxyphosphanyl)-2-fluoro-beta-L-ribofuranosyl]pyrimidine-2,4(1h,3h)-dione	0.750
96	125	2'-O-fluoroethyl-5-methyl-uridine-5'-monophosphate	0.741
97	2AT	2'-O-allyl thymidine-5'-monophosphate	0.741
98	2GT	2'-O-propargyl thymidine-5'-monophosphate	0.741
99	LHH	[(2~{R},3~{R},4~{R},5~{R})-5-(4-acetamido-2-oxidanylidene-pyrimidin-1-yl)-4-methoxy-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate	0.741
100	P2T	2'-O-propyl thymidine-5-monophosphate	0.741
101	RFJ	2'-O-methyl-5'-O-thiophosphonoguanosine	0.741
102	U31	2'-O-3-aminopropyl 2'-deoxyuridine-5'-monophosphate	0.741
103	U36	2'-O-methyoxyethyl-uridine-5'-monophosphate	0.741
104	UZL	O2'-methylycytidine	0.739
105	1CC	5-carboxy-2'-deoxycytidine monophosphate	0.731
106	5HM	5-(hydroxymethyl)cytidine 5'-(dihydrogen phosphate)	0.731
107	5PC	5(1-propynyl)-2'-deoxycytidine-5'-monophosphate	0.731
108	C36	5-methyl-5-fluoro-2'-deoxy-cytidine-5'-monophosphate	0.731
109	C49	4-thio,5-fluoro,5-methyl-2'-deoxy-cytidine-5'-monophosphate	0.731
110	CX2	2'-deoxy-5'-O-{(R)-hydroxy[(2-sulfanylethyl)amino]phosphoryl}cytidine	0.731
111	E3C	3-ethyl, cytidine-5'-monophosphate	0.731
112	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	0.731
113	KEA	2'-azido-2'-deoxycytidine 5'-(dihydrogen phosphate)	0.731
114	LCC	[(1r,3r,4r,7s)-7-hydroxy-3-(5-methylcytosin-1-yl)-2,5-dioxabicyclo[2.2.1]hept-1-yl]methyl dihydrogen phosphate	0.731
115	MMX	3-ethyl-3,4,5,6-tetrahydrocytidine 5'-(dihydrogen phosphate)	0.731
116	RSQ	5-formylcytidine 5'-(dihydrogen phosphate)	0.731
117	T23	2'-O-methyl-3'-methyl-3'-deoxy-arabinofuranosyl-thymine-5'-phosphate	0.731
118	XFC	4-amino-1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)-2-oxo-1,2-dihydropyrimidine-5-carbaldehyde	0.731
119	0DT	2'-deoxy-L-ribo-furanosyl thymidine-5'-monophosphate	0.720
120	0U	L-uridine-5'-monophosphate	0.720
121	2AU	2'-aminouridine	0.720
122	4SC	2'-deoxy-5-methyl-4'-thiocytidine 5'-(dihydrogen phosphate)	0.720
123	4SU	4-thiouridine-5'-monophosphate	0.720
124	5IU	5-iodo-2'-deoxyuridine-5'-monophosphate	0.720
125	6HC	1',5'-anhydro-2',3'-dideoxy-2'-(cytosin-1-yl)-6'-O-phosphoryl-D-arabino-hexitol	0.720
126	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	0.720
127	8XU	1-(5-O-phosphono-beta-D-xylofuranosyl)pyrimidine-2,4(1h,3h)-dione	0.720
128	A1IT3	2'-thiouridine-5'-monophosphate	0.720
129	BRU	5-bromo-2'-deoxyuridine-5'-monophosphate	0.720
130	C34	N4-methyl-2'-deoxy-cytidine-5'-monophosphate	0.720
131	DT	Thymidine-5'-monophosphate	0.720
132	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	0.720
133	H2U	5,6-dihydrouridine-5'-monophosphate	0.720
134	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	0.720
135	MDK	4-amino-1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-3-methylpyridin-2(1h)-one	0.720
136	MUM	5'-O-(dihydroxyphosphanyl)-5-methyl-5,6-dihydrouridine	0.720
137	NOH	2'-deoxy-N-hydroxycytidine 5'-(dihydrogen phosphate)	0.720
138	OHU	2'-deoxy-5-hydroxyuridine 5'-(dihydrogen phosphate)	0.720
139	PBT	[3-hydroxy-5-(5-methyl-2,4-dioxotetrahydro-1(2h)-pyrimidinyl)tetrahydro-2-furanyl]methyl dihydrogen phosphate	0.720
140	QBT	[(2r,3s,5r)-3-hydroxy-5-[(5s)-5-methyl-2,4-dioxo-1,3-diazinan-1-yl]oxolan-2-yl]methyl dihydrogen phosphate	0.720
141	RSP	4-amino-1-(5-O-phosphono-beta-D-ribofuranosyl)pyrimidine-2(1h)-thione	0.720
142	S4C	4'-thio-4'-deoxy-cytosine-5'-monophosphate	0.720
143	T2S	Thymidine-5'-dithiophosphorate	0.720
144	T4S	1-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-4-hydroseleno-5-methylpyrimidin-2(1h)-one	0.720
145	THS	Thymidine-5'-(dithio)phosphate	0.720
146	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	0.720
147	TMP	Thymidine-5'-phosphate	0.720
148	TTI	2'-deoxy-5-telluroxouridine 5'-(dihydrogen phosphate)	0.720
149	U	Uridine-5'-monophosphate	0.720
150	U5P	Uridine-5'-monophosphate	0.720
151	UAR	Uracil arabinose-5'-phosphate	0.720
152	UCL	5-chloro-2'-deoxyuridine 5'-(dihydrogen phosphate)	0.720
153	UD5	5-fluorouridine	0.720
154	UF2	1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)pyrimidine-2,4(1h,3h)-dione	0.720
155	UFP	5-fluoro-2'-deoxyuridine-5'-monophosphate	0.720
156	UFT	2'-deoxy-2'-fluorouridine 5'-(dihydrogen phosphate)	0.720
157	US5	1-(5-O-phosphono-beta-D-ribofuranosyl)-4-selanylpyrimidin-2(1h)-one	0.720
158	XCL	[(1s,4r,6r)-6-hydroxy-4-(cytosin-9-yl)cyclohex-2-en-1-yl]methyl dihydrogen phosphate	0.720
159	XCR	[(1r,4s,6s)-4-(4-amino-2-oxopyrimidin-1(2h)-yl)-6-hydroxycyclohex-2-en-1-yl]methyl dihydrogen phosphate	0.720
160	XCT	4-amino-1-(2,3-dideoxy-6-O-phosphono-beta-D-erythro-hexopyranosyl)pyrimidin-2(1h)-one	0.720
161	127	2'-O-aminooxy-ethyl-5-methyl-uridine-5'-monophosphate	0.714
162	2BT	2'-O-butyl-thymidine	0.714
163	NMT	1-(o2-(methylcarbamoyl)-o5-hydroxyphosphinyl-beta-D-ribofuranosyl)thymine	0.714
164	SMT	2'-[(methylthio)ethyloxy]-thymidine-5'-monophosphate	0.714
165	T38	2'-O-ethoxymethylene thymidine 5'-monophosphate	0.714
166	T39	2'-O-methoxyethylene thymidine 5'-monophosphate	0.714
167	42E	[(2r,5s)-5-(4-amino-2-oxopyrimidin-1(2h)-yl)-1,3-oxathiolan-2-yl]methyl dihydrogen phosphate	0.708
168	CDW	(4r)-3-(2-deoxy-5-O-phosphono-beta-D-erythro-pentofuranosyl)-1,3-diazabicyclo[2.2.0]hex-5-en-2-one	0.708
169	UBB	2',3'-dideoxy-uridine-5'-monophosphate	0.708
170	Y5P	1-(5-O-phosphono-beta-D-ribofuranosyl)-1,4-dihydropyrimidine	0.708
171	1FC	4-amino-1-(2-deoxy-2-fluoro-5-O-phosphono-beta-D-arabinofuranosyl)-2-oxo-1,2-dihydropyrimidine-5-carboxylic acid	0.704
172	A2M	2'-O-methyladenosine 5'-(dihydrogen phosphate)	0.704
173	CVC	[(1~{R},5~{R},6~{R},8~{R})-6-(4-azanyl-2-oxidanylidene-pyrimidin-1-yl)-3,3-bis(oxidanyl)-2,4,7-trioxa-3$L^{4}-vanadabicyclo[3.3.0]octan-8-yl]methyl dihydrogen phosphate	0.704
174	LTP	4-amino-1-{2-deoxy-5-O-[(R)-hydroxy(phosphonooxy)phosphoryl]-beta-L-erythro-pentofuranosyl}pyrimidin-2(1h)-one	0.704
175	M5M	2'-(N-acetamide)-cytidine-5'-monophosphate	0.704
176	N5M	5-nitrocytidine 5'-(dihydrogen phosphate)	0.704
177	YYY	Deoxycytidine diphosphate	0.704