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 4530 results
Search term:
MF = 'C_{20}H_{18}N_{4}O_{4}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
2801256
zoom
C
20
H
18
N
4
O
4
378.38132
98
78
0
0
18878868
- 2/2 defined
zoom
C
20
H
18
N
4
O
4
378.3813
39
29
0
0
998475
zoom
C
20
H
18
N
4
O
4
378.3813
28
15
0
0
998474
zoom
C
20
H
18
N
4
O
4
378.3813
27
12
0
0
2182382
- 0/1 defined
zoom
C
20
H
18
N
4
O
4
378.38132
27
19
0
0
2182782
- 0/1 defined
zoom
C
20
H
18
N
4
O
4
378.38132
26
15
0
0
4767723
- 0/1 defined
zoom
C
20
H
18
N
4
O
4
378.3813
24
15
0
0
5259339
zoom
C
20
H
18
N
4
O
4
378.3813
24
16
0
0
2914799
zoom
C
20
H
18
N
4
O
4
378.38132
23
13
0
0
2914800
zoom
C
20
H
18
N
4
O
4
378.38132
23
15
0
0
580487
zoom
C
20
H
18
N
4
O
4
378.3813
23
15
0
0
11969088
zoom
C
20
H
18
N
4
O
4
378.3813
23
16
0
0
1798554
zoom
C
20
H
18
N
4
O
4
378.3813
22
14
0
0
2251889
- 0/1 defined
zoom
C
20
H
18
N
4
O
4
378.38132
21
15
0
0
5268112
zoom
C
20
H
18
N
4
O
4
378.3813
21
14
0
0
32041175
- 2/2 defined
zoom
C
20
H
18
N
4
O
4
378.3813
21
18
0
0
6005134
zoom
C
20
H
18
N
4
O
4
378.3813
20
11
0
0
2914801
zoom
C
20
H
18
N
4
O
4
378.38132
20
13
0
0
3935236
- 0/1 defined
zoom
C
20
H
18
N
4
O
4
378.3813
20
12
0
0
2258161
zoom
C
20
H
18
N
4
O
4
378.38132
20
15
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement