Jump to main content
Jump to site nav
Home
About us
Membership & professional community
Campaigning & outreach
Journals, books & databases
Teaching & learning
News & events
Locations & contacts
Home
About us
Web APIs
Help
Sign in
ChemSpider
Search and share chemistry
Simple
Structure
Advanced
History
Molecular Formula:
Define range intervals using parentheses.
E.g. C7H(10-14)O(0-4)
Molecular Weight:
to
±
(example: 123 ± 1)
min/max
+/-
Nominal Mass:
to
±
-2H+
-H+
+H+
+2H+
min/max
+/-
Average Mass:
to
±
M+CH3CNH
M+CH3OH2
M+.
M+K
M+Na
M+NH4
M+H
M-H
M+acetate
M-.
M+Cl
-e
+e
min/max
+/-
Monoisotopic Mass:
to
±
M+CH3CNH
M+CH3OH2
M+.
M+K
M+Na
M+NH4
M+H
M-H
M+acetate
M-.
M+Cl
-e
+e
min/max
+/-
Search
Search Hits Limit:
100
1000
10000
Filter
Single/Multi-component
Search Any
Search Single-Component Structures Only
Search Multi-Component Structures Only
Isotopically Labeled
Search Any
Search Isotopically Labeled Structures Only
Disregard Isotopically Labeled Structures
Additional Filters
Filter only those having analytical data
Found 18179 results
Search term:
MF = 'C_{20}H_{21}N_{3}O_{2}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
8034640
zoom
C
20
H
21
N
3
O
2
335.3996
74
49
0
0
28295021
zoom
C
20
H
21
N
3
O
2
335.3996
60
48
0
0
1281046
zoom
C
20
H
21
N
3
O
2
335.3996
46
29
0
0
4254737
zoom
C
20
H
21
N
3
O
2
335.39964
40
28
0
0
2552558
zoom
C
20
H
21
N
3
O
2
335.3996
40
31
0
0
2732833
zoom
C
20
H
21
N
3
O
2
335.39964
38
27
0
0
21329948
zoom
C
20
H
21
N
3
O
2
335.3996
37
27
0
0
728504
zoom
C
20
H
21
N
3
O
2
335.3996
34
18
0
0
1470698
zoom
C
20
H
21
N
3
O
2
335.3996
31
20
0
0
5384264
- 1/1 defined
zoom
C
20
H
21
N
3
O
2
335.3996
31
24
0
0
474436
zoom
C
20
H
21
N
3
O
2
335.3996
30
22
0
0
601881
zoom
C
20
H
21
N
3
O
2
335.3996
29
23
0
0
605960
zoom
C
20
H
21
N
3
O
2
335.3996
28
17
0
0
401030
zoom
C
20
H
21
N
3
O
2
335.3996
28
17
0
0
2224179
- 0/1 defined
zoom
C
20
H
21
N
3
O
2
335.39964
28
16
0
0
1047803
zoom
C
20
H
21
N
3
O
2
335.3996
26
18
0
0
2204613
- 0/1 defined
zoom
C
20
H
21
N
3
O
2
335.39964
26
17
0
0
730055
zoom
C
20
H
21
N
3
O
2
335.3996
25
19
0
0
744689
zoom
C
20
H
21
N
3
O
2
335.3996
25
19
0
0
2244630
zoom
C
20
H
21
N
3
O
2
335.39964
25
21
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement