
10 A
inosine
268.229496

4 A
1,2-O-dimethyladenosine
295.298867

13 A
1,2-O-dimethylinosine
296.283473

0 A
2-O-methyladenosine
281.271879

11 A
1-methylinosine
282.256484

12 A
2-O-methylinosine
282.256484

3 A
2-O-ribosyladenosine (phosphate)
479.340753

2 A
2-methyladenosine
281.271879

20 A
2-methylthio-N6-(cis-hydroxyisopentenyl) adenosine
397.454563

18 A
2-methylthio-N6-hydroxynorvalyl carbamoyladenosine
472.478213

21 A
2-methylthio-N6-isopentenyladenosine
381.455259

17 A
2-methylthio-N6-methyladenosine
327.363255

16 A
2-methylthio-N6-threonyl carbamoyladenosine
458.451225

25 A
C8-methyladenosine
281.271879

8 A
N6,2-O-dimethyladenosine
295.298867

9 A
N6,N6,O-2-trimethyladenosine
309.325856

7 A
N6,N6-dimethyladenosine
295.298867

22 A
N6-(cis-hydroxyisopentenyl)adenosine
351.363186

24 A
N6-acetyladenosine
309.28222

5 A
N6-glycinylcarbamoyladenosine
368.306566

23 A
N6-hydroxynorvalylcarbamoyladenosine
426.386836

19 A
N6-isopentenyladenosine
335.363882

15 A
N6-methyl-N6-threonylcarbamoyladenosine
426.386836

6 A
N6-methyladenosine
281.271879

14 A
N6-threonylcarbamoyladenosine
412.359848

- A
adenosine
267.24489

2 C
2-thiocytidine
259.284795

0 C
2-O-methylcytidine
257.2467

3 C
3-methylcytidine
257.2467

11 C
5,2-O-dimethylcytidine
271.273689

13 C
5-formyl-2-O-methylcytidine
285.257042

12 C
5-formylcytidine
271.230053

14 C
5-hydroxymethylcytidine
273.246005

5 C
5-methylcytidine
257.2467

8 C
N4,2-O-dimethylcytidine
271.273689

10 C
N4,N4,2-O-trimethylcytidine
285.300678

9 C
N4,N4-dimethylcytidine
271.273689

7 C
N4-acetyl-2-O-methylcytidine
299.284031

6 C
N4-acetylcytidine
285.257042

4 C
N4-methylcytidine
257.2467

1 C
lysidine
371.394395

- C
cytidine
243.219712

14 G
4-demethylwyosine
321.293257

7 G
7-methylguanosine
298.279159

15 G
isowyosine
335.320246

12 G
N2,2-O-dimethylguanosine
311.298172

6 G
archaeosine
0.0

13 G
methylwyosine
349.347235

19 G
peroxywybutosine
540.48779

16 G
wybutosine
508.489181

18 G
undermodified hydroxywybutos313ine
466.451851

- G
guanosine
283.244195

8 G
N2,7-dimethylguanosine
311.298172
 
4 G
N2,N2,2-O-trimethylguanosine
325.325161

9 G
N2,N2,7-trimethylguanosine
325.325161
 
3 G
N2,N2-dimethylguanosine
311.298172

2 G
N2-methylguanosine
297.271183

1 G
1-methylguanosine
297.271183

11 G
1,2-O-dimethylguanosine
310.290196

86 G
10-glutamyl-4-demethylwyosine
422.398569

58 G
10-glutamylmethylesterwyosine
450.452546

17 G
hydroxywybutosine
524.488486

72 G
10-glutamylwyosine
436.425557

0 G
2-O-methylguanosine
297.271183

5 G 
2-O-ribosylguanosine (phosphate) 
495.340057

8 U
1-methyl-3-(3-amino-3-carboxypropyl) 
359.336617

12 U
2-thio-2-O-methyluridine
274.296389

9 U
2-O-methylpseudouridine
258.231306

0 U
2-O-methyluridine
258.231306

14 U
3-(3-amino-3-carboxypropyl)uridine
345.309629

10 U
3-methylpseudouridine
258.231306

4 U
4-thiouridine
260.269401

16 U
5,2-O-dimethyluridine
272.258295

36 U
5-(carboxyhydroxymethyl)uridine 
318.240257

41 U
5-(carboxyhydroxymethyl)uridine methyl ester
332.267246

26 U
5-aminomethyl-2-selenouridine
336.112687

25 U
5-aminomethyl-2-thiouridine
289.311088

43 U
5-carbamoylmethyl-2-O-methyluridine
315.283335

42 U
5-carbamoylmethyluridine
301.256347

31 U
5-carboxymethylaminomethyl-2-O-methyluridine
345.309629

33 U
5-carboxymethylaminomethyl-2-selenouridine
394.149322

32 U
5-carboxymethylaminomethyl-2-thiouridine
347.347723

30 U
5-carboxymethylaminomethyluridine
331.28264

22 U
5-hydroxyuridine
260.203622

39 U
5-methoxycarbonylmethyl-2-O-methyluridine
330.29493

40 U
5-methoxycarbonylmethyl-2-thiouridine
332.333024

37 U
5-methoxycarbonylmethyluridine
316.267941

23 U
5-methoxyuridine
274.230611

17 U
5-methyl-2-thiouridine
274.296389

29 U
5-methylaminomethyl-2-selenouridine
349.1317

28 U
5-methylaminomethyl-2-thiouridine
303.338077

27 U
5-methylaminomethyluridine
287.272994

24 U
5-methylaminouridine
273.246005

34 U
5-carboxymethyluridine
302.240952

2 U
2-thiouridine
260.269401

21 U
5-formyl-2-selenuoridine
335.081341

20 U
5-formyl-2-thiouridine
288.279742

19 U
5-formyl-O-dimethyluridine
286.241648

18 U
5-formyl-methyluridine
272.214659

13 U
3,2-O-dimethyluridine
272.258295

15 U
3-(3-amino-3-carboxypropyl)methyluridine
359.336617

3 U
3-methyluridine
258.231306

11 U
se2U
307.070999

7 U
1-methylpseudouridine
258.231306

47 U
5-methyldihydrouridine
260.247258

6 U
dihydrouridine
246.220269

35 U
cm5s2U
318.306036

5 U
5-methyluridine
258.231306

45 U
5-taurinomethyl-2-thiouridine
397.427368

44 U
5-taurinomethyluridine
381.362285

1 U
pseudouridine
244.204317

- U
uridine
244.204317

46 U
uridine 5-oxyacetic acid
318.240257

38 U
uridine 5-oxyacetic acid methyl ester
332.267246

1 Q
Qbase
277.283611

5 Q
epoxyqueuosine
425.399126

6 Q
galactosyl-queuosine
571.542325

8 Q
gluQtRNA
538.515474

7 Q
mannosyl-queuosine
571.542325

3 Q
preQ1base
179.181962

- Q
queuosine
409.399821

4 Q
7-aminomethyl-7-deazaguanosine
311.298172

2 Q
7-cyano-7-deazaguanosine
307.266269