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 932 results
Search term:
MF = 'C_{21}H_{20}O_{4}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
10025572
zoom
C
21
H
20
O
4
336.3811
40
32
0
0
687087
zoom
C
21
H
20
O
4
336.3811
39
26
0
0
8307357
zoom
C
21
H
20
O
4
336.3811
37
25
0
0
702337
zoom
C
21
H
20
O
4
336.3811
31
18
0
0
611906
zoom
C
21
H
20
O
4
336.3811
30
18
0
0
1699878
zoom
C
21
H
20
O
4
336.3811
28
15
0
0
495086
- 0/1 defined
zoom
C
21
H
20
O
4
336.3811
27
19
0
0
746488
zoom
C
21
H
20
O
4
336.3811
26
17
0
0
1285315
zoom
C
21
H
20
O
4
336.3811
26
15
0
0
1308579
zoom
C
21
H
20
O
4
336.3811
26
13
0
0
1533019
zoom
C
21
H
20
O
4
336.3811
26
17
0
0
699377
zoom
C
21
H
20
O
4
336.3811
25
14
0
0
2186993
- 0/1 defined
zoom
C
21
H
20
O
4
336.3811
25
18
0
0
2340706
- 2/2 defined
zoom
C
21
H
20
O
4
336.3811
25
22
0
0
2995849
- 0/1 defined
zoom
C
21
H
20
O
4
336.3811
25
15
0
0
1533012
zoom
C
21
H
20
O
4
336.3811
25
13
0
0
592846
zoom
C
21
H
20
O
4
336.3811
25
15
0
0
611452
zoom
C
21
H
20
O
4
336.3811
25
11
0
0
615257
zoom
C
21
H
20
O
4
336.3811
25
14
0
0
4502956
- 0/2 defined
zoom
C
21
H
20
O
4
336.3811
24
23
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement