The Nucleic Acid Modification Database

ID	Symbol	Common_Name	Chemical_Formula	Nucleoside_Mass
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