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 1469 results
Search term:
MF = 'C_{21}H_{20}O'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
93906
zoom
C
21
H
20
O
288.3829
53
37
0
6
205578
zoom
C
21
H
20
O
288.3829
31
23
0
0
259863
zoom
C
21
H
20
O
288.3829
31
27
0
3
1408739
zoom
C
21
H
20
O
288.3829
27
23
0
0
4452800
zoom
C
21
H
20
O
288.3829
27
18
0
0
3285939
zoom
C
21
H
20
O
288.3829
23
14
0
0
3397281
zoom
C
21
H
20
O
288.3829
18
14
0
0
201735
zoom
C
21
H
20
O
288.3829
17
13
0
1
2629332
- 0/1 defined
zoom
C
21
H
20
O
288.3829
16
8
0
0
216167
zoom
C
21
H
20
O
288.3829
15
10
0
1
12547442
zoom
C
21
H
20
O
288.3829
15
8
0
0
108526
zoom
C
21
H
20
O
288.3829
14
16
0
1
4527174
zoom
C
21
H
20
O
288.3829
14
14
0
0
263771
zoom
C
21
H
20
O
288.3829
12
6
0
0
171136
zoom
C
21
H
20
O
288.3829
12
9
0
0
256702
zoom
C
21
H
20
O
288.3829
10
7
0
0
205743
- 0/1 defined
zoom
C
21
H
20
O
288.3829
10
9
0
0
4781124
zoom
C
21
H
20
O
288.3829
10
8
0
0
30775830
zoom
C
21
H
20
O
288.3829
10
5
0
0
131340
zoom
C
21
H
20
O
288.3829
9
9
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement