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 63 results
Search term:
MF = 'C_{21}H_{13}NO_{2}'
1
2
3
4
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
706425
zoom
C
21
H
13
NO
2
311.3334
24
15
0
0
1115629
zoom
C
21
H
13
NO
2
311.3334
22
17
0
0
1229088
zoom
C
21
H
13
NO
2
311.3334
13
10
0
0
1733890
zoom
C
21
H
13
NO
2
311.3334
13
7
0
0
229168
zoom
C
21
H
13
NO
2
311.3334
11
6
0
0
10597753
zoom
C
21
H
13
NO
2
311.3334
10
9
0
0
10900272
zoom
C
21
H
13
NO
2
311.3334
8
5
0
0
28635234
zoom
C
21
H
13
NO
2
311.3334
7
4
0
0
318739
zoom
C
21
H
13
NO
2
311.3334
6
3
0
0
2064707
zoom
C
21
H
13
NO
2
311.33342
6
2
0
0
2066254
zoom
C
21
H
13
NO
2
311.33342
5
4
0
0
223270
zoom
C
21
H
13
NO
2
311.3334
5
3
0
0
229167
zoom
C
21
H
13
NO
2
311.3334
5
3
0
0
28569751
zoom
C
21
H
13
NO
2
311.3334
5
4
0
0
24818998
zoom
C
21
H
13
NO
2
311.3334
5
4
0
0
25022154
zoom
C
21
H
13
NO
2
311.3334
5
4
0
0
25026409
zoom
C
21
H
13
NO
2
311.3334
4
3
0
0
28551918
zoom
C
21
H
13
NO
2
311.3334
4
3
0
0
286160
- 0/1 defined
zoom
C
21
H
13
NO
2
311.3334
4
2
0
0
297507
zoom
C
21
H
13
NO
2
311.3334
4
2
0
0
1
2
3
4
Advertisement
Advertisement
Spotlight
Advertisement