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 4229 results
Search term:
MF = 'C_{23}H_{20}N_{4}O_{2}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
2305
zoom
C
23
H
20
N
4
O
2
384.4305
40
35
0
0
23317143
zoom
C
23
H
20
N
4
O
2
384.4305
33
18
0
0
1007673
zoom
C
23
H
20
N
4
O
2
384.4305
28
17
0
0
4500057
zoom
C
23
H
20
N
4
O
2
384.4305
27
16
0
0
1157756
zoom
C
23
H
20
N
4
O
2
384.4305
26
20
0
0
28600333
zoom
C
23
H
20
N
4
O
2
384.4305
26
15
0
0
5259473
zoom
C
23
H
20
N
4
O
2
384.4305
25
14
0
0
1173717
zoom
C
23
H
20
N
4
O
2
384.4305
24
19
0
0
1174552
zoom
C
23
H
20
N
4
O
2
384.4305
24
18
0
0
1233572
zoom
C
23
H
20
N
4
O
2
384.4305
24
14
0
0
4500232
zoom
C
23
H
20
N
4
O
2
384.4305
23
17
0
0
5259470
zoom
C
23
H
20
N
4
O
2
384.4305
22
13
0
0
5259636
zoom
C
23
H
20
N
4
O
2
384.4305
22
14
0
0
4292
zoom
C
23
H
20
N
4
O
2
384.4305
22
24
0
0
575706
- 0/1 defined
zoom
C
23
H
20
N
4
O
2
384.4305
22
15
0
0
921069
zoom
C
23
H
20
N
4
O
2
384.4305
22
15
0
0
938337
zoom
C
23
H
20
N
4
O
2
384.4305
22
14
0
0
2178806
zoom
C
23
H
20
N
4
O
2
384.4305
22
14
0
0
2221070
- 0/1 defined
zoom
C
23
H
20
N
4
O
2
384.4305
22
16
0
0
2252830
- 0/1 defined
zoom
C
23
H
20
N
4
O
2
384.4305
21
16
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement