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ChemSpider
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Structure
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Molecular Formula:
Define range intervals using parentheses.
E.g. C7H(10-14)O(0-4)
Molecular Weight:
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(example: 123 ± 1)
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Average Mass:
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M+CH3CNH
M+CH3OH2
M+.
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M+Na
M+NH4
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M-H
M+acetate
M-.
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+e
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M+CH3CNH
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M+Na
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Found 9569 results
Search term:
MF = 'C_{20}H_{21}NO_{4}'
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ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
599697
- 1/1 defined
zoom
C
20
H
21
NO
4
339.385
120
102
0
0
4518
zoom
C
20
H
21
NO
4
339.385
113
3344
4617
1120
1266373
- 1/1 defined
zoom
C
20
H
21
NO
4
339.385
107
63
0
0
31709
- 0/1 defined
zoom
C
20
H
21
NO
4
339.385
105
216
0
49
5379893
- 1/1 defined
zoom
C
20
H
21
NO
4
339.385
87
58
0
0
2036877
- 1/1 defined
zoom
C
20
H
21
NO
4
339.38504
72
46
0
0
2036865
zoom
C
20
H
21
NO
4
339.38504
71
60
0
0
36666
zoom
C
20
H
21
NO
4
339.385
62
44
0
0
90471
- 0/1 defined
zoom
C
20
H
21
NO
4
339.385
62
69
0
0
91532
- 1/1 defined
zoom
C
20
H
21
NO
4
339.385
55
60
0
0
9733933
- 1/1 defined
zoom
C
20
H
21
NO
4
339.385
52
38
0
0
3359995
zoom
C
20
H
21
NO
4
339.38504
49
46
0
0
19910
- 1/1 defined
zoom
C
20
H
21
NO
4
339.385
49
52
0
6
24593848
- 1/1 defined
zoom
C
20
H
21
NO
4
339.385
48
34
0
0
9145040
- 2/3 defined
zoom
C
20
H
21
NO
4
339.385
47
28
0
0
26286716
zoom
C
20
H
21
NO
4
339.385
46
29
0
0
26541359
zoom
C
20
H
21
NO
4
339.385
46
30
0
0
13502541
zoom
C
20
H
21
NO
4
339.385
43
36
0
0
4479103
- 0/1 defined
zoom
C
20
H
21
NO
4
339.385
43
40
0
0
2111885
zoom
C
20
H
21
NO
4
339.38504
39
34
0
0
1
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