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 6093 results
Search term:
MF = 'C_{20}H_{25}NO_{4}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
5225
- 0/1 defined
zoom
C
20
H
25
NO
4
343.4168
69
114
5
24
133238
- 0/2 defined
zoom
C
20
H
25
NO
4
343.4168
60
183
111
3
600014
- 1/1 defined
zoom
C
20
H
25
NO
4
343.4168
57
69
0
0
80700
- 0/1 defined
zoom
C
20
H
25
NO
4
343.4168
46
59
0
0
18826005
- 2/2 defined
zoom
C
20
H
25
NO
4
343.4168
42
51
0
0
83710
- 0/1 defined
zoom
C
20
H
25
NO
4
343.4168
39
64
1
448
333870
zoom
C
20
H
25
NO
4
343.4168
39
46
0
0
554785
- 1/1 defined
zoom
C
20
H
25
NO
4
343.4168
36
46
0
0
1311664
zoom
C
20
H
25
NO
4
343.4168
35
43
0
0
639033
zoom
C
20
H
25
NO
4
343.4168
34
42
0
0
4588965
- 5/5 defined
zoom
C
20
H
25
NO
4
343.4168
31
43
74
0
1152009
zoom
C
20
H
25
NO
4
343.4168
30
34
0
0
625933
zoom
C
20
H
25
NO
4
343.4168
29
34
0
0
765369
zoom
C
20
H
25
NO
4
343.4168
29
35
0
0
765621
zoom
C
20
H
25
NO
4
343.4168
29
33
0
0
582809
zoom
C
20
H
25
NO
4
343.4168
29
31
0
0
89759
zoom
C
20
H
25
NO
4
343.4168
28
31
0
0
619454
zoom
C
20
H
25
NO
4
343.4168
28
32
0
0
1381226
zoom
C
20
H
25
NO
4
343.4168
28
36
0
0
1469939
zoom
C
20
H
25
NO
4
343.4168
28
35
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement