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 4131 results
Search term:
MF = 'C_{20}H_{19}N_{3}O'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
21474412
zoom
C
20
H
19
N
3
O
317.3844
59
39
0
0
4072321
- 0/1 defined
zoom
C
20
H
19
N
3
O
317.38436
38
27
0
0
4090929
zoom
C
20
H
19
N
3
O
317.38436
35
23
0
0
1267180
zoom
C
20
H
19
N
3
O
317.3844
31
23
0
0
2265521
zoom
C
20
H
19
N
3
O
317.38436
30
17
0
0
2266686
zoom
C
20
H
19
N
3
O
317.38436
30
17
0
0
2403026
- 0/1 defined
zoom
C
20
H
19
N
3
O
317.3844
29
18
0
0
1665960
zoom
C
20
H
19
N
3
O
317.3844
29
20
0
0
1074338
zoom
C
20
H
19
N
3
O
317.3844
27
17
0
0
623365
zoom
C
20
H
19
N
3
O
317.3844
26
20
0
0
1620244
zoom
C
20
H
19
N
3
O
317.3844
26
17
0
0
2265862
zoom
C
20
H
19
N
3
O
317.38436
25
15
0
0
21481357
zoom
C
20
H
19
N
3
O
317.3844
25
17
0
0
3002269
- 0/1 defined
zoom
C
20
H
19
N
3
O
317.38436
24
24
0
0
2263821
zoom
C
20
H
19
N
3
O
317.38436
24
15
0
0
664889
zoom
C
20
H
19
N
3
O
317.3844
24
16
0
0
696714
zoom
C
20
H
19
N
3
O
317.3844
24
16
0
0
6390348
zoom
C
20
H
19
N
3
O
317.3844
24
21
0
0
577625
zoom
C
20
H
19
N
3
O
317.3844
23
13
0
0
4649801
zoom
C
20
H
19
N
3
O
317.3844
23
14
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement