The Nucleic Acid Modification Database

ID	Symbol	Common_Name	Chemical_Formula	Nucleoside_Mass
1	m¹A	1-methyladenosine	C₁₁H₁₅N₅O₄	281.27
2	m²A	2-methyladenosine	C₁₁H₁₅N₅O₄	281.27
3	m⁶A	N6-methyladenosine	C₁₁H₁₅N₅O₄	281.27
4	Am	2'-O-methyladenosine	C₁₁H₁₅N₅O₄	281.27
5	m⁸A	8-methyladenosine	C₁₁H₁₅N₅O₄	281.27
6	m⁶₂A	N6,N6-dimethyladenosine	C₁₂H₁₇N₅O₄	295.3
7	m⁶Am	N6,2'-O-dimethyladenosine	C₁₂H₁₇N₅O₄	295.3
8	m¹Am	1,2'-O-dimethyladenosine	C₁₂H₁₇N₅O₄	295.3
9	ac⁶A	N6-acetyladenosine	C₁₂H₁₅N₅O₅	309.28
10	m⁶₂Am	N6,N6,2'-O-trimethyladenosine	C₁₃H₁₉N₅O₄	309.33
11	ms²m⁶A	2-methylthio-N6-methyladenosine	C₁₂H₁₇N₅O₄S	327.36
12	i⁶A	N6-isopentenyladenosine	C₁₅H₂₁N₅O₄	335.36
13	io⁶A	N6-(cis-hydroxyisopentenyl)adenosine	C₁₅H₂₁N₅O₅	351.36
14	g⁶A	N6-glycinylcarbamoyladenosine	C₁₃H₁₆N₆O₇	368.31
15	ms²i⁶A	2-methylthio-N6-isopentenyladenosine	C₁₆H₂₃N₅O₄S	381.45
16	ms²io⁶A	2-methylthio-N6-(cis-hydroxyisopentenyl) adenosine	C₁₆H₂₃N₅O₅S	397.45
17	t⁶A	N6-threonylcarbamoyladenosine	C₁₅H₂₀N₆O₈	412.36
18	m⁶t⁶A	N6-methyl-N6-threonylcarbamoyladenosine	C₁₆H₂₂N₆O₈	426.39
19	hn⁶A	N6-hydroxynorvalylcarbamoyladenosine	C₁₆H₂₂N₆O₈	426.39
20	ms²t⁶A	2-methylthio-N6-threonyl carbamoyladenosine	C₁₆H₂₂N₆O₈S	458.45
21	ms²hn⁶A	2-methylthio-N6-hydroxynorvalyl carbamoyladenosine	C₁₇H₂₄N₆O₈S	472.47
22	Ar(p)	2'-O-ribosyladenosine (phosphate)	C₁₆H₂₄N₅O₁₁P	479.37
23	m¹G	1-methylguanosine	C₁₁H₁₅N₅O₅	297.27
24	m²G	N2-methylguanosine	C₁₁H₁₅N₅O₅	297.27
25	m⁷G	7-methylguanosine	C₁₁H₁₆N₅O₅	298.28
26	Gm	2'-O-methylguanosine	C₁₁H₁₅N₅O₅	297.27
27	m²²G	N2,N2-dimethylguanosine	C₁₂H₁₇N₅O₅	311.3
28	m²Gm	N2,2'-O-dimethylguanosine	C₁₂H₁₇N₅O₅	311.3
29	m^2,7G	N2,7-dimethylguanosine	C₁₂H₁₈N₅O₅	312.3
30	m¹Gm	1,2'-O-dimethylguanosine	C₁₂H₁₇N₅O₅	311.3
31	imG-14	4-demethylwyosine	C₁₃H₁₅N₅O₅	321.29
32	m^2,2Gm	N2,N2,2'-O-trimethylguanosine	C₁₃H₁₉N₅O₅	325.33
33	m^2,2,7G	N2,N2,7-trimethylguanosine	C₁₃H₂₀N₅O₅	326.33
34	m^2,7Gm	N2,7,2'-O-trimethylguanosine	C₁₃H₂₀N₅O₅	326.33
35	imG	wyosine	C₁₄H₁₇N₅O₅	335.32
36	imG2	isowyosine	C₁₄H₁₇N₅O₅	335.32
37	mimG	methywyosine	C₁₅H₁₉N₅O₅	349.35
38	OHyW*	undermodified hydroxywybutosine	C₁₈H₂₄N₆O₈	452.42
39	Gr(p)	2'-O-ribosylguanosine (phosphate)	C₁₅H₂₂N₅O₁₂P	495.34
40	yW	wybutosine	C₂₁H₂₈N₆O₉	508.49
41	OHyW	hydroxywybutosine	C₂₁H₂₈N₆O₁₀	524.49
42	o₂yW	peroxywybutosine	C₂₁H₂₈N₆O₁₁	540.49
43	m³C	3-methylcytidine	C₁₀H₁₅N₃O₅	257.25
44	m⁵C	5-methylcytidine	C₁₀H₁₅N₃O₅	257.25
45	Cm	2'-O-methylcytidine	C₁₀H₁₅N₃O₅	257.25
46	m⁴C	N4-methylcytidine	C₁₀H₁₅N₃O₅	257.25
47	s²C	2-thiocytidine	C₉H₁₃N₃O₄S	259.29
48	f⁵C	5-formylcytidine	C₁₀H₁₃N₃O₆	271.23
49	m⁵Cm	5,2'-O-dimethylcytidine	C₁₁H₁₇N₃O₅	271.27
50	m⁴Cm	N4,2'-O-dimethylcytidine	C₁₁H₁₇N₃O₅	271.27
51	hm⁵C	5,-hydroxymethylcytidine	C₁₀H₁₅N₃O₆	273.25
52	ac⁴C	N4-acetylcytidine	C₁₁H₁₅N₃O₆	285.26
53	f⁵Cm	5-formyl-2'-O-methylcytidine	C₁₁H₁₅N₃O₆	285.26
54	m⁴₂Cm	N4,N4,2'-O-trimethylcytidine	C₁₂H₁₉N₃O₅	285.3
55	ac⁴Cm	N4-acetyl-2'-O-methylcytidine	C₁₂H₁₇N₃O₆	299.28
56	C⁺	agmatidine	C₁₄H₂₅N₇O₄	355.4
57	k²C	lysidine	C₁₅H₂₅N₅O₆	371.39
58	hm⁵Cm	5,2'-O-hydroxymethylcytidine	C₁₁H₁₇N₃O₆	287.27
59	Ψ	pseudouridine	C₉H₁₂N₂O₆	244.2
60	D	dihydrouridine	C₉H₁₄N₂O₆	246.22
61	m⁵U	5-methyluridine	C₁₀H₁₄N₂O₆	258.23
62	Um	2'-O-methyluridine	C₁₀H₁₄N₂O₆	258.23
63	m¹Ψ	1-methylpseudouridine	C₁₀H₁₄N₂O₆	258.23
64	Ψm	2'-O-methylpseudouridine	C₁₀H₁₄N₂O₆	258.23
65	m³U	3-methyluridine	C₁₀H₁₄N₂O₆	258.23
66	m³Ψ	3-methylpseudouridine	C₁₀H₁₄N₂O₆	258.23
67	ho⁵U	5-hydroxyuridine	C₉H₁₂N₂O₇	260.2
68	m⁵D	5-methyldihydrouridine	C₁₀H₁₆N₂O₆	260.25
69	s²U	2-thiouridine	C₉H₁₂N₂O₅S	260.27
70	s⁴U	4-thiouridine	C₉H₁₂N₂O₅S	260.27
71	m⁵Um	5,2'-O-dimethyluridine	C₁₁H₁₆N₂O₆	272.26
72	m³Um	3,2'-O-dimethyluridine	C₁₁H₁₆N₂O₆	272.26
73	mo⁵U	5-methoxyuridine	C₁₀H₁₄N₂O₇	274.23
74	m⁵s²U	5-methyl-2-thiouridine	C₁₀H₁₄N₂O₅S	274.3
75	s²Um	2-thio-2'-O-methyluridine	C₁₀H₁₄N₂O₅S	274.3
76	cnm⁵U	5-cyanomethyl-uridine	C₁₁H₁₃N₃O₆	283.15
77	mnm⁵U	5-methylaminomethyluridine	C₁₁H₁₇N₃O₆	287.27
78	nm⁵s²U	5-aminomethyl-2-thiouridine	C₁₀H₁₅N₃O₅S	289.31
79	ncm⁵U	5-carbamoylmethyluridine	C₁₁H₁₅N₃O₇	301.26
80	cm⁵U	5-carboxymethyluridine	C₁₁H₁₄N₂O₈	302.24
81	mnm⁵s²U	5-methylaminomethyl-2-thiouridine	C₁₁H₁₇N₃O₅S	303.33
82	ncm⁵Um	5-carbamoylmethyl-2'-O-methyluridine	C₁₂H₁₇N₃O₇	315.28
83	mcm⁵U	5-methoxycarbonylmethyluridine	C₁₂H₁₆N₂O₈	316.27
84	cmo⁵U	uridine 5-oxyacetic acid	C₁₁H₁₄N₂O₉	318.24
85	chm⁵U	5-(carboxyhydroxymethyl)uridine	C₁₁H₁₄N₂O₉	318.24
86	mcm⁵Um	5-methoxycarbonylmethyl-2'-O-methyluridine	C₁₃H₁₈N₂O₈	330.29
87	cmnm⁵U	5-carboxymethylaminomethyluridine	C₁₂H₁₇N₃O₈	331.28
88	mcmo⁵U	uridine 5-oxyacetic acid methyl ester	C₁₂H₁₆N₂O₉	332.27
89	mchm⁵U	5-(carboxyhydroxymethyl)uridine methyl ester	C₁₂H₁₆N₂O₉	332.27
90	mcm⁵s²U	5-methoxycarbonylmethyl-2-thiouridine	C₁₂H₁₆N₂O₇S	332.33
91	mnm⁵se²U	5-methylaminomethyl-2-selenouridine	C₁₁H₁₇N₃O₅Se	350.23
92	inm⁵Um	5-(isopentenylaminomethyl)- 2'-O-methyluridine	C₁₆H₂₅N₃O₆	355.39
93	inm⁵s²U	5-(isopentenylaminomethyl)- 2-thiouridine	C₁₅H₂₃N₃O₅S	357.43
94	m¹acp³Ψ	1-methyl-3-(3-amino-3-carboxypropyl) pseudouridine	C₁₄H₂₁N₃O₈	359.34
95	tm⁵U	5-taurinomethyluridine	C₁₂H₁₉N₃O₉S	381.36
96	tm⁵s²U	5-taurinomethyl-2-thiouridine	C₁₂H₁₉N₃O₈S₂	397.43
97	gmnm⁵s²U	geranylated 5-methylaminomethyl-2-thiouridine	C₂₁H₃₃N₃O₅S	439.32
98	gcmnm⁵s²U	geranylated 5-carboxymethylaminomethyl-2-thiouridine	C₂₂H₃₃N₃O₇S	483.58
99	inm⁵U	5-(isopentenylaminomethyl)uridine	C₁₅H₂₃N₃O₆	341.36
100	acp³U	3-(3-amino-3-carboxypropyl)uridine	C₁₃H₁₉N₃O₈	345.19
101	cmnm⁵Um	5-carboxymethylaminomethyl- 2'-O-methyluridine	C₁₃H₁₉N₃O₈	345.31
102	cmnm⁵s²U	5-carboxymethylaminomethyl-2-thiouridine	C₁₂H₁₇N₃O₇S	347.35
103	I	inosine	C₁₀H₁₂N₄O₅	268.23
104	m¹I	1-methylinosine	C₁₁H₁₄N₄O₅	282.26
105	Im	2'-O-methylinosine	C₁₁H₁₄N₄O₅	282.26
106	m¹Im	1,2'-O-dimethylinosine	C₁₂H₁₆N₄O₅	296.28
107	preQ0	7-cyano-7-deazaguanosine	C₁₂H₁₃N₅O₅	307.26
108	preQ1	7-aminomethyl-7-deazaguanosine	C₁₂H₁₇N₅O₅	311.3
109	G+	archaeosine	C₁₂H₁₆N₆O₅	324.3
110	Q	queuosine	C₁₇H₂₃N₅O₇	409.4
111	oQ	epoxyqueuosine	C₁₇H₂₃N₅O₈	425.4
112	galQ	galactosyl-queuosine	C₂₃H₃₃N₅O₁₂	571.54
113	manQ	mannosyl-queuosine	C₂₃H₃₃N₅O₁₂	571.54