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 23015 results
Search term:
MF = 'C_{20}H_{23}N_{3}O_{2}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
82759
- 0/2 defined
zoom
C
20
H
23
N
3
O
2
337.4155
85
126
0
0
167225
- 2/2 defined
zoom
C
20
H
23
N
3
O
2
337.4155
63
72
57
6
28641653
zoom
C
20
H
23
N
3
O
2
337.4155
58
45
0
0
61893
zoom
C
20
H
23
N
3
O
2
337.4155
46
67
0
0
962789
zoom
C
20
H
23
N
3
O
2
337.4155
32
18
0
0
618348
zoom
C
20
H
23
N
3
O
2
337.4155
31
16
0
0
4101277
- 0/1 defined
zoom
C
20
H
23
N
3
O
2
337.41552
31
22
0
0
1698314
zoom
C
20
H
23
N
3
O
2
337.4155
31
17
0
0
2115915
- 0/1 defined
zoom
C
20
H
23
N
3
O
2
337.41552
30
20
0
0
4120784
zoom
C
20
H
23
N
3
O
2
337.41552
30
19
0
0
764363
zoom
C
20
H
23
N
3
O
2
337.4155
30
18
0
0
929701
zoom
C
20
H
23
N
3
O
2
337.4155
30
17
0
0
962788
zoom
C
20
H
23
N
3
O
2
337.4155
29
17
0
0
2404732
- 0/1 defined
zoom
C
20
H
23
N
3
O
2
337.4155
29
18
0
0
4674775
- 0/1 defined
zoom
C
20
H
23
N
3
O
2
337.4155
28
27
0
0
2259664
zoom
C
20
H
23
N
3
O
2
337.41552
28
18
0
0
2262660
zoom
C
20
H
23
N
3
O
2
337.41552
28
16
0
0
632314
zoom
C
20
H
23
N
3
O
2
337.4155
28
18
0
0
605363
zoom
C
20
H
23
N
3
O
2
337.4155
27
17
0
0
1274691
zoom
C
20
H
23
N
3
O
2
337.4155
27
15
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement