The Nucleic Acid Modification Database

ID	Symbol	Common_Name	Chemical_Formula	Nucleoside_Mass
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