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 1078 results
Search term:
MF = 'C_{20}H_{17}NO_{2}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
508303
zoom
C
20
H
17
NO
2
303.3545
62
49
0
0
3409237
- 0/1 defined
zoom
C
20
H
17
NO
2
303.35448
35
25
0
0
593427
zoom
C
20
H
17
NO
2
303.3545
33
17
0
0
639876
zoom
C
20
H
17
NO
2
303.3545
33
22
0
0
630153
zoom
C
20
H
17
NO
2
303.3545
32
16
0
0
618682
zoom
C
20
H
17
NO
2
303.3545
31
20
0
0
681186
zoom
C
20
H
17
NO
2
303.3545
30
22
0
0
689840
zoom
C
20
H
17
NO
2
303.3545
29
18
0
0
805143
zoom
C
20
H
17
NO
2
303.3545
29
18
0
0
294332
zoom
C
20
H
17
NO
2
303.3545
29
20
0
0
507103
zoom
C
20
H
17
NO
2
303.3545
27
19
0
0
654088
zoom
C
20
H
17
NO
2
303.3545
27
18
0
0
671276
zoom
C
20
H
17
NO
2
303.3545
27
18
0
0
698525
zoom
C
20
H
17
NO
2
303.3545
27
19
0
0
792005
zoom
C
20
H
17
NO
2
303.3545
27
15
0
93
724544
zoom
C
20
H
17
NO
2
303.3545
26
11
0
0
789874
zoom
C
20
H
17
NO
2
303.3545
26
17
0
0
2138544
- 0/1 defined
zoom
C
20
H
17
NO
2
303.35448
26
17
0
0
488098
zoom
C
20
H
17
NO
2
303.3545
26
20
0
0
587737
zoom
C
20
H
17
NO
2
303.3545
26
13
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement