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 2857 results
Search term:
MF = 'C_{20}H_{16}N_{4}O_{2}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
29783967
zoom
C
20
H
16
N
4
O
2
344.3666
35
21
0
0
2112465
- 0/1 defined
zoom
C
20
H
16
N
4
O
2
344.36664
28
20
0
0
2377043
- 0/1 defined
zoom
C
20
H
16
N
4
O
2
344.36664
28
19
0
0
2379165
- 0/1 defined
zoom
C
20
H
16
N
4
O
2
344.36664
27
19
0
0
4291120
zoom
C
20
H
16
N
4
O
2
344.36664
26
21
0
0
2112464
- 0/1 defined
zoom
C
20
H
16
N
4
O
2
344.36664
25
18
0
0
304661
zoom
C
20
H
16
N
4
O
2
344.3666
25
19
0
0
683971
zoom
C
20
H
16
N
4
O
2
344.3666
24
13
0
0
4453485
- 0/1 defined
zoom
C
20
H
16
N
4
O
2
344.36664
24
18
0
0
21266689
zoom
C
20
H
16
N
4
O
2
344.3666
23
16
0
0
4609259
zoom
C
20
H
16
N
4
O
2
344.3666
22
13
0
0
843764
zoom
C
20
H
16
N
4
O
2
344.3666
22
16
0
0
1059304
zoom
C
20
H
16
N
4
O
2
344.3666
21
15
0
0
2103291
zoom
C
20
H
16
N
4
O
2
344.36664
21
17
0
0
693028
zoom
C
20
H
16
N
4
O
2
344.3666
21
14
0
0
568785
zoom
C
20
H
16
N
4
O
2
344.3666
21
14
0
0
648121
zoom
C
20
H
16
N
4
O
2
344.3666
21
11
0
0
650597
zoom
C
20
H
16
N
4
O
2
344.3666
21
13
0
0
3194725
zoom
C
20
H
16
N
4
O
2
344.3666
21
15
0
0
3868112
- 0/1 defined
zoom
C
20
H
16
N
4
O
2
344.3666
21
15
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement