name,short_name,abbrev,original_base,smile,formula,mass_monoiso,mass_avg,mass_prot,lc_elution_time,lc_elution_comment,product_ions
32,1,2′-O-dimethyladenosine,m1Am,œ,A,C3(OC(CO)C(O)C(O(C))3)N2C=NC1=C2N=CN(C)C1=N,C12O4N5H17,295.1281,295.2989,296.1359,,,150
63,1,2′-O-dimethylguanosine,m1Gm,ε,G,C3(OC(CO)C(O)C(O(C))3)N2C=NC1=C2N=C(N)N(C)C1=O,C12O5N5H17,311.123,311.2977,312.1308,,,166
33,1,2′-O-dimethylinosine,m1Im,ξ,A,C3(OC(CO)C(O)C(O(C))3)N2C=NC1=C2N=CN(C)C1=O,C12O5N4H16,296.1121,296.2835,297.1199,,,151
8,1-methyl-3-(3-amino-3-carboxypropyl)pseudouridine,m1acp3Y,α,U,OC1C(OC(CO)C1O)C2=CN(C)C(=O)N(CCC(N)C(=O)O)C2=O,C14O8N3H21,359.1329,359.3366,360.1407,,,228
83,1-methyladenosine,m1A,",A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=CN(C)C1=N,C11O4N5H15,281.1124,281.2719,282.1202,0,64 (Kellner 2014); 0,72 (Kellner 2014),between U and G (Kellner 2014, Kellner 2014),150
22,1-methylguanosine,m1G,K,G,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=C(N)N(C)C1=O,C11O5N5H15,297.1073,297.2712,298.1151,1,23 (Kellner 2014); 1,28 (Kellner 2014),between G and A (Kellner 2014, Kellner 2014),166
26,1-methylinosine,m1I,O,A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=CN(C)C1=O,C11O5N4H14,282.0964,282.2565,283.1042,1,24 (Kellner 2014),between G and A (Kellner 2014),151
88,1-methylpseudouridine,m1Y,],U,C3(OC(CO)C(O)C(O)3)C1=CN(C)C(=O)NC1(=O),C10O6N2H14,258.0852,258.2313,259.093,None,None,169/179/227/209
136,2,8-dimethyladenosine,m2,8A,±,A,CC1=NC(=C2N=C(C)[N](C3OC(CO)C(O)C3O)C2=N1)N,C12H17N5O4,295.1281,295.2983,296.1358,,,164
182,2- methylthiomethylenethio-N6-isopentenyl-adenosine,msms2i6A,£,A,CSCSC1=NC(NCC=C(C)C)=C2N=CN([C@@H]3O[C@H](CO)C(O)C3O)C2=N1,C17H25N5O4S2,427.1347,427.54,428.0,3.56,after m6A,
166,2-geranylthiouridine,ges2U,Γ,U,C/C(C)=C\CCC(\C)=C\CSC1=NC(=O)C=CN1[C@@H]2O[C@H](CO)[C@H](O)C2O,C19H28N2O5S,396.1719,396.5078,397.1797,None,None,265
101,2-lysidine,k2C,},C,O=C(O)C(N)CCCCNC1N=C(N)C=CN1[C@@H]2O[C@H](CO)[C@H](O)C2O,C15O6N5H25,371.1805,371.3944,372.1883,1,14 (Kellner 2014),between G and A (Kellner 2014),240
37,2-methyladenosine,m2A,/,A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=C(C)N=C1N,C11O4N5H15,281.1124,281.2719,282.1202,1,65 (Kellner 2014); 1,91 (Kellner 2014),between A and m6A (Kellner 2014, Kellner 2014),150
180,2-methylthio cyclic N6-threonylcarbamoyladenosine,ms2ct6A,ÿ,A,CSC1=NC(C2C(=O)N[C@@H]([C@@H](C)O)C2=O)=C2N=CN([C@@H]3O[C@H](CO)C(O)C3O)C2=N1,C17H21N5O7S,439.1162,439.4429,None,,,None
126,2-methylthio-N6-(cis-hydroxyisopentenyl) adenosine,ms2io6A,≠,A,C/C(CO)=C\CNc3nc(SC)nc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O,C16O5N5H23S1,397.142,397.4546,398.1498,3,19 (Kellner 2014),after m6A (Kellner 2014),266
79,2-methylthio-N6-hydroxynorvalylcarbamoyladenosine,ms2hn6A,≈,A,O=C(O)C(NC(=O)Nc3nc(SC)nc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(O)CC,C17O8N6H24S1,472.1376,472.4782,473.1454,None,None,341
51,2-methylthio-N6-isopentenyladenosine,ms2i6A,*,A,C/C(C)=C\CNc3nc(SC)nc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O,C16O4N5H23S1,381.1471,381.4553,382.1549,3,54 (Kellner 2014),after m6A (Kellner 2014),250
5,2-methylthio-N6-methyladenosine,ms2m6A,∞,A,CNc3nc(SC)nc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O,C12O4N5H17S1,327.1001,327.3633,328.1079,None,None,196
55,2-methylthio-N6-threonylcarbamoyladenosine,ms2t6A,[,A,O=C(O)C(NC(=O)Nc3nc(SC)nc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(C)O,C16O8N6H22S1,458.122,458.4512,459.1298,,,327
94,2-selenouridine,se2U,ω,U,C3(OC(CO)C(O)C(O)3)N1C=CC(=O)NC1(=[Se]),C9O5N2H12Se1,305.9919,306.1221,306.9997,None,None,175
117,2-thio-2′-O-methyluridine,s2Um,∏,U,C3(OC(CO)C(O)C(O(C))3)N1C=CC(=O)NC1(=S),C10O5N2H14S1,274.0623,274.2964,275.0701,,,129
92,2-thiocytidine,s2C,%,C,C3(OC(CO)C(O)C(O)3)N1C=CC(N)=NC1(=S),C9O4N3H13S1,259.0627,259.2848,260.0705,0,68 (Kellner 2014); 0,86 (Kellner 2014),between U and G (Kellner 2014, Kellner 2014),128
100,2-thiouridine,s2U,2,U,C3(OC(CO)C(O)C(O)3)N1C=CC(=O)NC1(=S),C9O5N2H12S1,260.0467,260.2694,261.0545,1,06 (Kellner 2014),between G and A (Kellner 2014),129
127,2′-O-methyladenosine,Am,:,A,C3(OC(CO)C(O)C(O(C))3)N2C=NC1=C2N=CN=C1N,C11O4N5H15,281.1124,281.2719,282.1195,1,59 (Kellner 2014); 1,83 (Kellner 2014),between A and m6A (Kellner 2014, Kellner 2014),136
84,2′-O-methylcytidine,Cm,B,C,C3(OC(CO)C(O)C(O(C))3)N1C=CC(N)=NC1(=O),C10O5N3H15,257.1012,257.2467,258.1082,0,90 (Kellner 2014); 0,92 (Kellner 2014),between U and G (Kellner 2014, Kellner 2014),112
28,2′-O-methylguanosine,Gm,#,G,C3(OC(CO)C(O)C(O(C))3)N2C=NC1=C2N=C(N)NC1=O,C11O5N5H15,297.1073,297.2712,298.1144,1,23 (Kellner 2014); 1,28 (Kellner 2014),between G and A (Kellner 2014, Kellner 2014),152
128,2′-O-methylinosine,Im,≤,A,C3(OC(CO)C(O)C(O(C))3)N2C=NC1=C2N=CNC1=O,C11O5N4H14,282.0964,282.2565,283.1042,,,137
103,2′-O-methylpseudouridine,Ym,Z,U,C3(OC(CO)C(O)C(O(C))3)C1=CNC(=O)NC1(=O),C10O6N2H14,258.0852,258.2313,259.093,,,223
50,2′-O-methyluridine,Um,J,U,C3(OC(CO)C(O)C(O(C))3)N1C=CC(=O)NC1(=O),C10O6N2H14,258.0852,258.2313,259.0926,1,10 (Kellner 2014); 1,09 (Kellner 2014),between G and A (Kellner 2014, Kellner 2014),113
179,2′-O-methyluridine 5-oxyacetic acid methyl ester,mcmo5Um,Ͽ,U,COC1[C@@H](O)[C@@H](CO)O[C@H]1N1C=C(OCC(=O)OC)C(=O)NC1=O,C13H18N2O9,346.1012,346.292,None,,,
20,2′-O-ribosyladenosine (phosphate),Ar(p),^,A,Nc4ncnc3c4ncn3[C@@H]2O[C@H](CO)C(O)[C@@H]2O[C@@H]1O[C@H](COP(=O)(O)O)[C@H](O)C1O,C15O11N5H22P1,479.1053,479.3408,None,None,None,None
34,2′-O-ribosylguanosine (phosphate),Gr(p),ℑ,G,NC4=Nc3c(ncn3[C@@H]2O[C@H](CO)C(O)[C@@H]2O[C@@H]1O[C@H](COP(=O)(O)O)[C@H](O)C1O)C(=O)N4,C15O12N5H22P1,495.1003,495.3401,None,None,None,None
174,2′3′-cyclic phosphate end,(pN)2′3′>p,,pppN,,,None,None,None,None,None,None
183,2′‐O‐Methyl-5-hydroxymethylcytidine,hm5Cm,¡,C,COC1C(O)[C@@H](CO)O[C@H]1N1C=C(CO)C(N)=NC1=O,C11H17N3O6,287.1117,287.272,None,,,
57,3,2′-O-dimethyluridine,m3Um,σ,U,O=C1C=CN(C(=O)N1C)[C@@H]2O[C@H](CO)[C@H](O)C2OC,C11O6N2H16,272.1008,272.2583,273.1086,,,127
137,3-(3-amino-3-carboxypropyl)-5,6-dihydrouridine,acp3D,Ð,U,NC(CCN1C(=O)CCN(C2OC(CO)C(O)C2O)C1=O)C(O)=O,C13H21N3O8,347.1329,347.3252,348.1407,,,216
138,3-(3-amino-3-carboxypropyl)pseudouridine,acp3Y,Þ,U,NC(CCN1C(=O)NC=C(C2OC(CO)C(O)C2O)C1=O)C(O)=O,C13H19N3O8,345.1172,345.3093,346.125,None,None,214
75,3-(3-amino-3-carboxypropyl)uridine,acp3U,X,U,C3(OC(CO)C(O)C(O)3)N1C=CC(=O)N(CCC(N)C(=O)O)C1(=O),C13O8N3H19,345.1172,345.3096,346.125,0,46 (Kellner 2014),between C and U (Kellner 2014),214/197/168
52,3-methylcytidine,m3C,',C,C[N+]1=C(N)C=CN([C@@H]2O[C@H](CO)[C@H](O)C2O)C1=O,C10O5N3H15,257.1012,257.2467,258.109,0,55 (Kellner 2014); 0,54 (Kellner 2014),between C and U (Kellner 2014, Kellner 2014),126
48,3-methylpseudouridine,m3Y,κ,U,C3(OC(CO)C(O)C(O)3)C1=CNC(=O)N(C)C1(=O),C10O6N2H14,258.0852,258.2313,259.093,None,None,169/179/227/209
49,3-methyluridine,m3U,δ,U,C3(OC(CO)C(O)C(O)3)N1C=CC(=O)N(C)C1(=O),C10O6N2H14,258.0852,258.2313,259.093,None,None,127
108,4-demethylwyosine,imG-14,†,G,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2NC4N(C=C(C)N=4)C1=O,C13O5N5H15,321.1073,321.2933,322.1151,None,None,190
7,4-thiouridine,s4U,4,U,C3(OC(CO)C(O)C(O)3)N1C=CC(=S)NC1(=O),C9O5N2H12S1,260.0467,260.2694,261.0545,1,15 (Kellner 2014); 1,18 (Kellner 2014),between G and A (Kellner 2014, Kellner 2014),129
2,5,2′-O-dimethylcytidine,m5Cm,τ,C,C3(OC(CO)C(O)C(O(C))3)N1C=C(C)C(N)=NC1(=O),C11O5N3H17,271.1168,271.2737,272.1246,,,126
122,5,2′-O-dimethyluridine,m5Um,\,U,C3(OC(CO)C(O)C(O(C))3)N1C=C(C)C(=O)NC1(=O),C11O6N2H16,272.1008,272.2583,273.1086,,,127
164,5-(carboxyhydroxymethyl)-2′-O-methyluridine methyl ester,mchm5Um,b,U,O=C(OC)C(O)C1=CN(C(=O)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2OC,C13H18N2O9,346.1012,346.294,347.109,,,201
85,5-(carboxyhydroxymethyl)uridine methyl ester,mchm5U,,,U,C3(OC(CO)C(O)C(O)3)N1C=C(C(O)C(=O)OC)C(=O)NC1(=O),C12O9N2H16,332.0856,332.2672,333.0934,None,None,129/183/316/201/297
146,5-(isopentenylaminomethyl)-2-thiouridine,inm5s2U,½,U,CC(C)=CCNCC1=CN(C2OC(CO)C(O)C2O)C(=S)NC1=O,C15H23N3O5S,357.1358,357.4308,358.1436,None,None,226
145,5-(isopentenylaminomethyl)-2′-O-methyluridine,inm5Um,¼,U,COC1C(O)C(CO)OC1N2C=C(CNCC=C(C)C)C(=O)NC2=O,C16H25N3O6,355.1743,355.3911,356.1821,,,210
144,5-(isopentenylaminomethyl)uridine,inm5U,¾,U,CC(C)=CCNCC1=CN(C2OC(CO)C(O)C2O)C(=O)NC1=O,C15H23N3O6,341.1587,341.3642,342.1665,None,None,210
169,5-aminomethyl-2-geranylthiouridine,nm5ges2U,Δ,U,C/C(C)=C\CCC(\C)=C\CSC1=NC(=O)C(CN)=CN1[C@@H]2O[C@H](CO)[C@H](O)C2O,C20H31N3O5S,425.1984,425.5494,426.2062,None,None,294
62,5-aminomethyl-2-selenouridine,nm5se2U,π,U,NCC1=CN(C(=[Se])NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C10O5N3H15Se1,337.0176,336.2032,336.0263,,,204
35,5-aminomethyl-2-thiouridine,nm5s2U,∫,U,NCC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C10O5N3H15S1,289.0732,289.3111,290.081,None,None,158
115,5-aminomethyluridine,nm5U,∪,U,C3(OC(CO)C(O)C(O)3)N1C=C(CN)C(=O)NC1(=O),C10O6N3H15,273.0961,273.246,274.1039,,,142
163,5-carbamoylhydroxymethyluridine,nchm5U,r,U,NC(=O)C(O)C1=CN(C(=O)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C11H15N3O8,317.0859,317.2555,318.0937,None,None,186/169/141
162,5-carbamoylmethyl-2-thiouridine,ncm5s2U,l,U,NC(=O)CC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C11H15N3O6S,317.0681,317.3227,318.0759,None,None,186/169/141
29,5-carbamoylmethyl-2′-O-methyluridine,ncm5Um,~,U,C3(OC(CO)C(O)C(O(C))3)N1C=C(CC(=O)N)C(=O)NC1(=O),C12O7N3H17,315.1066,315.2833,316.1144,,,170/153/125
43,5-carbamoylmethyluridine,ncm5U,&,U,C3(OC(CO)C(O)C(O)3)N1C=C(CC(=O)N)C(=O)NC1(=O),C11O7N3H15,301.091,301.2563,302.0988,0,50 (Kellner 2014),between C and U (Kellner 2014),170/153/125
73,5-carboxyhydroxymethyluridine,chm5U,≥,U,C3(OC(CO)C(O)C(O)3)N1C=C(C(O)C(=O)O)C(=O)NC1(=O),C11O9N2H14,318.0699,318.2403,319.0777,None,None,187/169/141
11,5-carboxymethyl-2-thiouridine,cm5s2U,℘,U,O=C(O)CC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C11O7N2H14S1,318.0522,318.306,319.06,None,None,187/169/141
167,5-carboxymethylaminomethyl-2-geranylthiouridine,cmnm5ges2U,f,U,O=C(O)CNCC1=CN(C(=NC1=O)SC\C=C(/C)CC\C=C(/C)C)[C@@H]2O[C@H](CO)[C@H](O)C2O,C22H33N3O7S,483.2039,483.586,484.2117,None,None,352
54,5-carboxymethylaminomethyl-2-selenouridine,cmnm5se2U,⊥,U,O=C(O)CNCC1=CN(C(=[Se])NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C12O7N3H17Se1,393.0239,393.2003,394.0317,None,None,262
45,5-carboxymethylaminomethyl-2-thiouridine,cmnm5s2U,$,U,O=C(O)CNCC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C12O7N3H17S1,347.0787,347.3477,348.0865,None,None,255/273/141/216/237/225
23,5-carboxymethylaminomethyl-2′-O-methyluridine,cmnm5Um,),U,C3(OC(CO)C(O)C(O(C))3)N1C=C(CNCC(=O)O)C(=O)NC1(=O),C13O8N3H19,345.1172,345.3096,346.125,,,271/221/111/129/253/200
87,5-carboxymethylaminomethyluridine,cmnm5U,!,U,C3(OC(CO)C(O)C(O)3)N1C=C(CNCC(=O)O)C(=O)NC1(=O),C12O8N3H17,331.1016,331.2826,332.1094,None,None,239/257/209/125/200/221
44,5-carboxymethyluridine,cm5U,◊,U,C3(OC(CO)C(O)C(O)3)N1C=C(CC(=O)O)C(=O)NC1(=O),C11O8N2H14,302.075,302.241,303.0828,,,171
178,5-cyanomethyluridine,cnm5U,Ѷ,U,N#CCC1=CN(C(=O)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C11H13N3O6,283.0804,283.2408,284.0882,None,None,152
104,5-formyl-2′-O-methylcytidine,f5Cm,°,C,C3(OC(CO)C(O)C(O(C))3)N1C=C(C(=O))C(N)=NC1(=O),C11O6N3H15,285.0961,285.257,286.1039,,,140
31,5-formylcytidine,f5C,>,C,C3(OC(CO)C(O)C(O)3)N1C=C(C(=O))C(N)=NC1(=O),C10O6N3H13,271.0804,271.2301,272.0882,None,None,140
143,5-hydroxycytidine,ho5C,Ç,C,NC1=NC(=O)N(C=C1O)C2OC(CO)C(O)C2O,C9H13N3O6,259.0804,259.2188,260.0877,None,None,128
119,5-hydroxymethylcytidine,hm5C,∅,C,C3(OC(CO)C(O)C(O)3)N1C=C(CO)C(N)=NC1(=O),C10O6N3H15,273.0961,273.246,274.1039,0,52 (Kellner 2014),between C and U (Kellner 2014),142
64,5-hydroxyuridine,ho5U,∝,U,C3(OC(CO)C(O)C(O)3)N1C=C(O)C(=O)NC1(=O),C9O7N2H12,260.0645,260.2036,261.0717,,,129
68,5-methoxycarbonylmethyl-2-thiouridine,mcm5s2U,3,U,O=C(OC)CC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C12O7N2H16S1,332.0678,332.333,333.0756,1,78 (Kellner 2014),between A and m6A (Kellner 2014),201/169/141
80,5-methoxycarbonylmethyl-2′-O-methyluridine,mcm5Um,∩,U,C3(OC(CO)C(O)C(O(C))3)N1C=C(CC(=O)OC)C(=O)NC1(=O),C13O8N2H18,330.1063,330.2949,331.1141,,,185
27,5-methoxycarbonylmethyluridine,mcm5U,1,U,C3(OC(CO)C(O)C(O)3)N1C=C(CC(=O)OC)C(=O)NC1(=O),C12O8N2H16,316.0907,316.2679,317.0985,,,185/153/125
74,5-methoxyuridine,mo5U,5,U,C3(OC(CO)C(O)C(O)3)N1C=C(OC)C(=O)NC1(=O),C10O7N2H14,274.0801,274.2306,275.0879,None,None,143
3,5-methyl-2-thiouridine,m5s2U,F,U,CC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C10O5N2H14S1,274.0623,274.2964,275.0701,1,36 (Kellner 2014),between G and A (Kellner 2014),143
168,5-methylaminomethyl-2-geranylthiouridine,mnm5ges2U,h,U,C/C(C)=C\CCC(\C)=C\CSC1=NC(=O)C(CNC)=CN1[C@@H]2O[C@H](CO)[C@H](O)C2O,C21H33N3O5S,439.2141,439.5762,440.2219,None,None,308
78,5-methylaminomethyl-2-selenouridine,mnm5se2U,≅,U,CNCC1=CN(C(=[Se])NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C11O5N3H17Se1,349.0341,349.1905,350.0419,None,None,218
110,5-methylaminomethyl-2-thiouridine,mnm5s2U,S,U,CNCC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C11O5N3H17S1,303.0889,303.3381,304.0967,None,None,172/255/273/141
129,5-methylaminomethyluridine,mnm5U,{,U,C3(OC(CO)C(O)C(O)3)N1C=C(CNC)C(=O)NC1(=O),C11O6N3H17,287.1117,287.273,288.1195,,,156/239/257/125/209
18,5-methylcytidine,m5C,?,C,C3(OC(CO)C(O)C(O)3)N1C=C(C)C(N)=NC1(=O),C10O5N3H15,257.1012,257.2467,258.109,0,82 (Kellner 2014); 0,84 (Kellner 2014),between U and G (Kellner 2014, Kellner 2014),126
17,5-methyldihydrouridine,m5D,ρ,U,C3(OC(CO)C(O)C(O)3)N1CC(C)C(=O)NC1(=O),C10O6N2H16,260.1008,260.2473,261.1086,None,None,129
12,5-methyluridine,m5U,T,U,C3(OC(CO)C(O)C(O)3)N1C=C(C)C(=O)NC1(=O),C10O6N2H14,258.0852,258.2313,259.093,1 (Kellner 2014, Kellner 2014),co-eluting with G (Kellner 2014, Kellner 2014),127
91,5-taurinomethyl-2-thiouridine,tm5s2U,∃,U,O=S(=O)(O)CCNCC1=CN(C(=S)NC1=O)[C@@H]2O[C@H](CO)[C@H](O)C2O,C12O8N3H19S2,397.0614,397.4274,398.0692,None,None,266
21,5-taurinomethyluridine,tm5U,Ê,U,C3(OC(CO)C(O)C(O)3)N1C=C(CNCCS(=O)(=O)O)C(=O)NC1(=O),C12O9N3H19S1,381.0842,381.3623,382.092,None,None,250
149,5′ (3′ -dephospho-CoA),CoA(pN),♠,pppN,SCCNC(=O)CCNC(=O)C(O)C(C)(C)COP([O-])(=O)OP([O-])(=O)OC[C@H]3O[C@@H](n2cnc1c(N)ncnc12)C(O)[C@H]3O*,C21H32N7O13P2S,684.1254,684.538,None,None,None,None
150,5′ (3′ -dephosphoacetyl-CoA),acCoA(pN),♣,pppN,CC(=O)SCCNC(=O)CCNC(=O)C(O)C(C)(C)COP([O-])(=O)OP([O-])(=O)OC[C@H]3O[C@@H](n2cnc1c(N)ncnc12)C(O)[C@H]3OP(=O)(O)O,C22H40N7O15P2S,736.1778,736.6113,None,None,None,None
151,5′ (3′ -dephosphomalonyl-CoA),malonyl-CoA(pN),♥,pppN,O=C(O)CC(=O)SCCNC(=O)CCNC(=O)C(O)C(C)(C)COP([O-])(=O)OP([O-])(=O)OC[C@H]3O[C@@H](n2cnc1c(N)ncnc12)C(O)[C@H]3OP(=O)(O)O,C23H40N7O17P2S,780.1676,780.6211,None,None,None,None
152,5′ (3′ -dephosphosuccinyl-CoA),succinyl-CoA(pN),♦,pppN,O=C(O)CCC(=O)SCCNC(=O)CCNC(=O)C(O)C(C)(C)COP([O-])(=O)OP([O-])(=O)OC[C@H]3O[C@@H](n2cnc1c(N)ncnc12)C(O)[C@H]3OP(=O)(O)O,C24H41N7O17P2S,793.1755,793.6316,None,,,None
153,5′ diphosphate end,p(pN),ϒ,pppN,[O-]P([O-])=O,PO3,78.9585,78.972,None,None,None,None
173,5′ hydroxyl end,5′-OH-N,,pppN,,,None,None,None,None,None,None
165,5′ monophosphate end,(pN),m,pppN,OC1[C@@H](OP([O-])([O-])=O)[C@@H](COP([O-])([O-])=O)O[C@H]1*,C5H7O10P2,288.9514,289.0521,None,None,None,None
154,5′ nicotinamide adenine dinucleotide,NAD(pN),Ξ,pppN,NC(=O)c1ccc[n+](c1)C5OC(COP([O-])(=O)OP([O-])(=O)OC[C@H]4O[C@@H](n3cnc2c(N)ncnc23)C(O)[C@H]4O*)C(O)C5O,C21H25N7O14P2,661.0935,661.4158,None,None,None,None
147,5′ triphosphate end,pp(pN),ϖ,pppN,[O-]P(=O)(OP(=O)([O-])[O-])OP(O)([O-])=O,P2O6,157.917,157.9439,None,None,None,None
71,7-aminocarboxypropyl-demethylwyosine,yW-86,¥,G,O=C(O)C(N)CCc3c(C)nc4Nc2c(ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(=O)n34,C17O7N6H22,422.155,422.3986,423.1628,None,None,291
77,7-aminocarboxypropylwyosine,yW-72,Ω,G,O=C(O)C(N)CCc3c(C)nc4N(C)c2c(ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(=O)n34,C18O7N6H24,436.1706,436.4256,437.1784,None,None,305
112,7-aminocarboxypropylwyosine methyl ester,yW-58,⇑,G,O=C(OC)C(N)CCc3c(C)nc4N(C)c2c(ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(=O)n34,C19O7N6H26,450.1863,450.4525,451.1941,None,None,319
123,7-aminomethyl-7-deazaguanosine,preQ1tRNA,∉,preQ0base,NCc2cn(c1N=C(N)NC(=O)c12)[C@@H]3O[C@H](CO)[C@H](O)C3O,C12O5N5H17,311.123,311.2982,312.1308,None,None,180
120,7-cyano-7-deazaguanosine,preQ0tRNA,φ,preQ0base,N#Cc2cn(c1N=C(N)NC(=O)c12)[C@@H]3O[C@H](CO)[C@H](O)C3O,C12O5N5H13,307.0917,307.2663,308.0995,None,None,176
116,7-methylguanosine,m7G,7,G,NC3=Nc2c([n+](C)cn2[C@H]1O[C@@H](CO)[C@@H](O)C1O)C([O-])N3,C11O5N5H17,299.123,299.2867,298.1151,0,83 (Kellner 2014); 0,89 (Kellner 2014),between U and G (Kellner 2014, Kellner 2014),166
132,7-methylguanosine cap (cap 0),m7Gpp(pN),©,pppN,[O-]P([O-])(=O)OP([O-])(=O)OC[C@@H]3O[C@H](n2c[n+](C)c1c2N=C(N)NC1=O)C(O)[C@@H]3O,C11H15N5O11P2,455.0243,455.2147,None,None,None,None
131,8-methyladenosine,m8A,â,A,CC1=NC2=C(N)N=CN=C2[N]1C3OC(CO)C(O)C3O,C11O4N5H15,281.1124,281.2719,282.1202,None,None,150
102,N2,2′-O-dimethylguanosine,m2Gm,γ,G,C3(OC(CO)C(O)C(O(C))3)N2C=NC1=C2N=C(N(C))NC1=O,C12O5N5H17,311.123,311.2982,312.1308,,,166
142,N2,7,2′-O-trimethylguanosine,m2,7Gm,æ,G,CNC3=Nc2c([n+](C)cn2[C@H]1O[C@@H](CO)[C@@H](O)C1OC)C([O-])N3,C13H21N5O5,327.1543,327.3404,326.1464,,,180
4,N2,7-dimethylguanosine,m2,7G,∨,G,CNC3=Nc2c([n+](C)cn2[C@H]1O[C@@H](CO)[C@@H](O)C1O)C([O-])N3,C12O5N5H19,313.1386,313.3136,312.1308,None,None,180
133,N2,7-dimethylguanosine cap (cap DMG),m2,7Gpp(pN),®,pppN,[O-]P([O-])(=O)OP([O-])(=O)OC[C@@H]3O[C@H](n2c[n+](C)c1c2N=C(NC)NC1=O)C(O)[C@@H]3O,C12H17N5O11P2,469.04,469.2416,None,None,None,None
40,N2,N2,2′-O-trimethylguanosine,m2,2Gm,|,G,C3(OC(CO)C(O)C(O(C))3)N2C=NC1=C2N=C(N(C)(C))NC1=O,C13O5N5H19,325.1386,325.3252,326.1464,,,180
111,N2,N2,7-trimethylguanosine,m2,2,7G,∠,G,CN(C)C3=Nc2c([n+](C)cn2[C@H]1O[C@@H](CO)[C@@H](O)C1O)C([O-])N3,C13O5N5H21,327.1543,327.3404,326.1464,None,None,194
134,N2,N2,7-trimethylguanosine cap (cap TMG),m2,2,7Gpp(pN),¶,pppN,CN(C)C3=Nc2c([n+](C)cn2[C@H]1O[C@@H](COP([O-])(=O)O)[C@@H](O)C1O)C(=O)N3,C13H19N5O11P2,483.0556,483.2685,None,None,None,None
13,N2,N2-dimethylguanosine,m2,2G,R,G,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=C(N(C)(C))NC1=O,C12O5N5H17,311.123,311.2982,312.1308,1,62 (Kellner 2014),between A and m6A (Kellner 2014),180
36,N2-methylguanosine,m2G,L,G,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=C(N(C))NC1=O,C11O5N5H15,297.1073,297.2712,298.1151,,,166
39,N4,2′-O-dimethylcytidine,m4Cm,λ,C,C3(OC(CO)C(O)C(O(C))3)N1C=CC(N(C))=NC1(=O),C11O5N3H17,271.1168,271.2737,272.1246,1,20 (Kellner 2014),between G and A (Kellner 2014),126
69,N4,N4,2′-O-trimethylcytidine,m4,4Cm,β,C,C3(OC(CO)C(O)C(O(C))3)N1C=CC(N(C)(C))=NC1(=O),C12O5N3H19,285.1325,285.3007,286.1403,,,140
15,N4,N4-dimethylcytidine,m4,4C,μ,C,C3(OC(CO)C(O)C(O)3)N1C=CC(N(C)(C))=NC1(=O),C11O5N3H17,271.1168,271.2737,272.1246,None,None,140
106,N4-acetyl-2′-O-methylcytidine,ac4Cm,ℵ,C,C3(OC(CO)C(O)C(O(C))3)N1C=CC(N(C(=O)C))=NC1(=O),C12O6N3H17,299.1117,299.284,300.1195,,,154/112
81,N4-acetylcytidine,ac4C,M,C,C3(OC(CO)C(O)C(O)3)N1C=CC(N(C(=O)C))=NC1(=O),C11O6N3H15,285.0961,285.257,286.1039,1,35 (Kellner 2014),between G and A (Kellner 2014),154/112
9,N4-methylcytidine,m4C,ν,C,C3(OC(CO)C(O)C(O)3)N1C=CC(N(C))=NC1(=O),C10O5N3H15,257.1012,257.2467,258.109,None,None,126
82,N6,2′-O-dimethyladenosine,m6Am,χ,A,C3(OC(CO)C(O)C(O(C))3)N2C=NC1=C2N=CN=C1N(C),C12O4N5H17,295.1281,295.2989,296.1359,,,150
124,N6,N6,2′-O-trimethyladenosine,m6,6Am,η,A,C3(OC(CO)C(O)C(O(C))3)N2C=NC1=C2N=CN=C1N(C)(C),C13O4N5H19,309.1437,309.3259,310.1515,,,164
41,N6,N6-dimethyladenosine,m6,6A,ζ,A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=CN=C1N(C)(C),C12O4N5H17,295.1281,295.2989,296.1359,1,86 (Kellner 2014); 2,57 (Kellner 2014),after m6A (Kellner 2014, Kellner 2014),164
10,N6-(cis-hydroxyisopentenyl)adenosine,io6A,`,A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=CN=C1N(CC=C(C)/CO),C15O5N5H21,351.1543,351.3632,352.1621,2,59 (Kellner 2014),after m6A (Kellner 2014),220
125,N6-acetyladenosine,ac6A,⇓,A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=CN=C1N(C(=O)C),C12O5N5H15,309.1073,309.2822,310.1151,,,178
177,N6-formyladenosine,f6A,Ϩ,A,O=CNc3ncnc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O,C11H13N5O5,295.0917,295.2549,296.0995,None,None,164
114,N6-glycinylcarbamoyladenosine,g6A,≡,A,O=C(O)CNC(=O)Nc3ncnc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O,C13O7N6H16,368.108,368.3066,369.1158,None,None,237
176,N6-hydroxymethyladenosine,hm6A,Ϫ,A,OCNc3ncnc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O,C11H15N5O5,297.1073,297.2708,298.1151,,,268/136
19,N6-hydroxynorvalylcarbamoyladenosine,hn6A,√,A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=CN=C1N(C(=O)NC(C(O)CC)C(=O)O),C16O8N6H22,426.1499,426.3868,427.1577,1,93 (Kellner 2014),between A and m6A (Kellner 2014),295
56,N6-isopentenyladenosine,i6A,+,A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=CN=C1N(CC=C(C)C),C15O4N5H21,335.1594,335.3639,336.1672,3,24 (Kellner 2014),after m6A (Kellner 2014),204/136/148
16,N6-methyl-N6-threonylcarbamoyladenosine,m6t6A,E,A,O=C(O)C(NC(=O)N(C)c3ncnc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(C)O,C16O8N6H22,426.1499,426.3868,427.1577,1,93 (Kellner 2014),between A and m6A (Kellner 2014),295
96,N6-methyladenosine,m6A,=,A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=CN=C1N(C),C11O4N5H15,281.1124,281.2719,282.1202,1,66 (Kellner 2014); 1,97 (Kellner 2014),after A (Kellner 2014, Kellner 2014),150
130,N6-threonylcarbamoyladenosine,t6A,6,A,CC(O)C(N)C(=O)NC(=O)Nc3ncnc2c3ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O,C15O8N6H20,412.1343,412.3598,413.1421,1,62 (Kellner 2014),between A and m6A (Kellner 2014),281
105,Qbase,Qbase,∴,preQ0base,NC1=NC2=C(C(CN[C@H]3C=CC(O)C3O)=CN2)C(=O)N1,C12O3N5H15,277.1175,277.2836,278.1253,,,146
109,adenosine,A,A,A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=CN=C1N,C10O4N5H13,267.0968,267.2449,268.1046,1.43,,136
141,agmatidine,C+,¿,C,NC(=N)NCCCCNC1=NC(=N)C=CN1C2OC(CO)C(O)C2O,C14H25N7O4,355.1968,355.3973,356.2046,None,None,224
170,alpha-dimethylmonophosphate cap,mm(pN),,pppN,OC1[C@@H](OP([O-])(=O)O)[C@@H](COP(=O)(OC)OC)O[C@H]1*,C7H14O10P2,320.0062,320.1297,None,None,None,None
171,alpha-methylmonophosphate cap,m(pN),,pppN,OC1[C@@H](OP([O-])([O-])=O)[C@@H](COP([O-])([O-])=O)O[C@H]1*,C6H12O10P2,305.9906,306.1028,None,None,None,None
99,archaeosine,G+,(,preQ0base,N=C(N)c2cn(c1N=C(N)NC(=O)c12)[C@@H]3O[C@H](CO)[C@H](O)C3O,C12H16N6O5,324.1182,324.2965,325.1255,,,193
175,cyclic N6-threonylcarbamoyladenosine,ct6A,e,A,C(O)(C4N/C(=N\c1c3c(ncn1)n([C@H]2C([C@H]([C@H](O2)CO)O)O)cn3)OC4=O)C,C15O7N6H18,394.1237,394.3442,395.1315,1,28 (Kellner 2014); 1,47 (Kellner 2014); 1,83 (Kellner 2014),between G and A (Kellner 2014); between A and m6A (Kellner 2014);,263
46,cytidine,C,C,C,C3(OC(CO)C(O)C(O)3)N1C=CC(N)=NC1(=O),C9O5N3H13,243.0855,243.2197,244.0933,0.42,,112
14,dihydrouridine,D,D,U,C3(OC(CO)C(O)C(O)3)N1CCC(=O)NC1(=O),C9O6N2H14,246.0852,246.2203,247.093,0,32 (Kellner 2014); 0,35 (Kellner 2014),before C (Kellner 2014, Kellner 2014),115/97
6,epoxyqueuosine,oQtRNA,ς,preQ0base,NC1=NC2=C(C(CNC3C4OC4C(O)C3O)=CN2[C@@H]2O[C@H](CO)[C@H](O)C2O)C(=O)N1,C17O8N5H23,425.1547,425.3991,426.1625,,,295/163
86,galactosyl-queuosine,galQtRNA,9,preQ0base,O[C@H]1C(O)[C@@H](CO)O[C@H]1n5cc(CNC3C=CC(O)C3O[C@@H]2OC(CO)[C@H](O)[C@@H](O)C2O)c4C(=O)NC(N)=Nc45,C23O12N5H33,571.2126,571.5423,572.2204,,,440
135,gamma-methyltriphosphate cap,mpp(pN),§,pppN,O=P([O-])(OP([O-])(=O)OC)OP(O)([O-])=O,CH3O6P2,172.9405,172.9787,None,None,None,None
42,glutamyl-queuosine,gluQtRNA,⊄,preQ0base,\N,C22O10N6H30,538.2023,538.5155,539.2101,,,407
38,guanosine,G,G,G,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=C(N)NC1=O,C10O5N5H13,283.0917,283.2442,284.0995,1,,152
161,guanosine added to any nucleotide,pG(pN),none,pppN,O=P(O)(O)OC[C@H]3O[C@@H](n2cnc1c2N=C(N)NC1=O)C(O)[C@H]3O*,C10H13N5O8P,362.0502,362.2159,None,None,None,None
148,guanylylated 5′ end (cap G),Gpp(pN),ϑ,pppN,[O-]P(=O)(O*)OP([O-])(=O)OC[C@@H]3O[C@H](n2cnc1c2N=C(N)NC1=O)C(O)[C@@H]3O,C10H12N5O11P2,440.0008,440.1799,None,None,None,None
181,hydroxy-N6-threonylcarbamoyladenosine,ht6A,«,A,OCC(O)C(NC(=O)NC1=C2N=CN([C@@H]3O[C@H](CO)C(O)C3O)C2=NC=N1)C(O)=O,C15H20N6O9,428.1292,428.3541,None,,,None
97,hydroxywybutosine,OHyW,⊆,G,O=C(OC)C(NC(=O)OC)C(O)Cc3c(C)nc4N(C)c2c(ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(=O)n34,C21O10N6H28,524.1867,524.4885,525.1945,,,393
113,inosine,I,I,A,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N=CNC1=O,C10O5N4H12,268.0808,268.2295,269.0886,0,95 (Kellner 2014, Kellner 2014),between U and G (Kellner 2014, Kellner 2014),137
89,isowyosine,imG2,⊇,G,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2NC4N(C(C)=C(C)N=4)C1=O,C14O5N5H17,335.123,335.3202,336.1308,None,None,204
90,mannosyl-queuosine,manQtRNA,8,preQ0base,O[C@H]1C(O)[C@@H](CO)O[C@H]1n5cc(CNC3C=CC(O)C3O[C@@H]2OC(CO)[C@@H](O)[C@@H](O)C2O)c4C(=O)NC(N)=Nc45,C23O12N5H33,571.2126,571.5423,572.2204,,,440
160,methylated undermodified hydroxywybutosine,OHyWy,y,G,O=C(OC)C(N)C(O)Cc3c(C)nc4N(C)c2c(ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(=O)n34,C19H26N6O8,466.1812,466.4511,467.189,None,None,335
59,methylwyosine,mimG,∑,G,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N(C)C4N(C(C)=C(C)N=4)C1=O,C15O5N5H19,349.1386,349.3472,350.1464,None,None,218
121,peroxywybutosine,o2yW,W,G,O=C(OC)C(NC(=O)OC)C(OO)Cc3c(C)nc4N(C)c2c(ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(=O)n34,C21O11N6H28,540.1816,540.4878,541.1894,None,None,409
95,preQ0base,preQ0base,ψ,preQ0base,NC2=Nc1ncc(C#N)c1C(=O)N2,C7O1N5H5,175.0494,175.1501,None,None,None,None
61,preQ1base,preQ1base,∇,preQ0base,NC2=Nc1ncc(CN)c1C(=O)N2,C7O1N5H9,179.0807,179.182,None,None,None,None
118,pseudouridine,Y,P,U,C3(OC(CO)C(O)C(O)3)C1=CNC(=O)NC1(=O),C9O6N2H12,244.0695,244.2043,245.0773,0,34 (Kellner 2014); 0,37 (Kellner 2014),before C (Kellner 2014),209/179/155
65,queuosine,QtRNA,Q,preQ0base,OC4C=CC(NCc2cn(c1N=C(N)NC(=O)c12)[C@@H]3O[C@H](CO)[C@H](O)C3O)C4O,C17O7N5H23,409.1597,409.3998,410.1675,3,40 (Kellner 2014),after m6A (Kellner 2014),295/163
93,undermodified hydroxywybutosine,OHyWx,š,G,O=C(O)C(N)C(O)Cc3c(C)nc4N(C)c2c(ncn2[C@@H]1O[C@H](CO)[C@H](O)C1O)C(=O)n34,C18O8N6H24,452.1655,452.4242,453.1733,None,None,321
25,unknown methylated base,Xm,Î,,-,-,0.0,0.0,None,None,None,None
98,unknown modification,xX,@,,-,-,0.0,0.0,None,None,None,None
72,unknown modified adenosine,xA,H,A,-,-,0.0,0.0,None,None,None,None
70,unknown modified cytidine,xC,<,C,-,-,0.0,0.0,None,None,None,None
66,unknown modified guanosine,xG,;,G,-,-,0.0,0.0,None,None,None,None
76,unknown modified uridine,xU,N,U,-,-,0.0,0.0,None,None,None,None
140,unknown nucleotide residue,N,.,,,-,0.0,0.0,None,None,None,None
60,uridine,U,U,U,C3(OC(CO)C(O)C(O)3)N1C=CC(=O)NC1(=O),C9O6N2H12,244.0695,244.2043,245.0773,0.58,,113
47,uridine 5-oxyacetic acid,cmo5U,V,U,C3(OC(CO)C(O)C(O)3)N1C=C(OCC(=O)O)C(=O)NC1(=O),C11O9N2H14,318.0699,318.2403,319.0777,0,54 (Kellner 2014),between C and U (Kellner 2014),187/169/141
58,uridine 5-oxyacetic acid methyl ester,mcmo5U,υ,U,C3(OC(CO)C(O)C(O)3)N1C=C(OCC(=O)OC)C(=O)NC1(=O),C12O9N2H16,332.0856,332.2672,333.0934,1,47 (Kellner 2014),between A and m6A (Kellner 2014),183/201/297/315/129
30,wybutosine,yW,Y,G,C3(OC(CO)C(O)C(O)3)N2C=NC1=C2N(C)C4N(C(CCC(C(=O)OC)NC(=O)OC)=C(C)N=4)C1=O,C21O9N6H28,508.1918,508.4892,509.1996,2,93 (Kellner 2014),after m6A (Kellner 2014),377
139,wyosine,imG,€,G,CC1=CN2C(=O)C3=C(N(C2=N1)C)N(C=N3)[C@H]4[C@@H]([C@@H]([C@H](O4)CO)O)O,C14H17N5O5,335.123,335.3202,336.1308,None,None,204