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 4457 results
Search term:
MF = 'C_{21}H_{21}NO_{3}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
2039926
zoom
C
21
H
21
NO
3
335.39634
73
46
0
0
3547031
zoom
C
21
H
21
NO
3
335.39634
46
35
0
0
736495
zoom
C
21
H
21
NO
3
335.3963
45
35
0
0
737220
zoom
C
21
H
21
NO
3
335.3963
45
36
0
0
736308
zoom
C
21
H
21
NO
3
335.3963
44
33
0
0
3692393
zoom
C
21
H
21
NO
3
335.39634
43
34
0
0
9253335
zoom
C
21
H
21
NO
3
335.3963
42
29
0
0
13047044
zoom
C
21
H
21
NO
3
335.3963
38
32
0
0
13047046
zoom
C
21
H
21
NO
3
335.3963
38
32
0
0
21329848
zoom
C
21
H
21
NO
3
335.3963
38
28
0
0
21329851
zoom
C
21
H
21
NO
3
335.3963
38
28
0
0
21329852
zoom
C
21
H
21
NO
3
335.3963
37
30
0
0
21329863
zoom
C
21
H
21
NO
3
335.3963
37
31
0
0
21329862
zoom
C
21
H
21
NO
3
335.3963
36
27
0
0
4514478
zoom
C
21
H
21
NO
3
335.3963
35
23
0
0
12918928
zoom
C
21
H
21
NO
3
335.3963
34
29
0
0
10053496
- 3/3 defined
zoom
C
21
H
21
NO
3
335.3963
33
25
0
0
21859001
- 0/1 defined
zoom
C
21
H
21
NO
3
335.3963
33
29
0
0
4514849
zoom
C
21
H
21
NO
3
335.3963
32
19
0
0
21399340
zoom
C
21
H
21
NO
3
335.3963
31
28
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement