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 7336 results
Search term:
MF = 'C_{21}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
2747847
zoom
C
21
H
20
N
4
O
2
360.4091
56
46
0
0
3027482
- 0/2 defined
zoom
C
21
H
20
N
4
O
2
360.4091
28
16
0
0
855351
zoom
C
21
H
20
N
4
O
2
360.4091
28
15
0
0
855352
zoom
C
21
H
20
N
4
O
2
360.4091
28
19
0
0
855343
zoom
C
21
H
20
N
4
O
2
360.4091
27
18
0
0
1268645
zoom
C
21
H
20
N
4
O
2
360.4091
27
19
0
0
563083
zoom
C
21
H
20
N
4
O
2
360.4091
26
16
0
0
853336
zoom
C
21
H
20
N
4
O
2
360.4091
25
16
0
0
1103753
zoom
C
21
H
20
N
4
O
2
360.4091
25
15
0
0
855399
zoom
C
21
H
20
N
4
O
2
360.4091
24
17
0
0
853326
zoom
C
21
H
20
N
4
O
2
360.4091
24
14
0
0
28600332
zoom
C
21
H
20
N
4
O
2
360.4091
24
14
0
0
4083714
zoom
C
21
H
20
N
4
O
2
360.4091
23
15
0
0
1540508
zoom
C
21
H
20
N
4
O
2
360.4091
23
14
0
0
3318712
- 0/1 defined
zoom
C
21
H
20
N
4
O
2
360.4091
23
15
0
0
3486009
- 0/2 defined
zoom
C
21
H
20
N
4
O
2
360.4091
23
15
0
0
3657196
zoom
C
21
H
20
N
4
O
2
360.4091
22
13
0
0
3814720
zoom
C
21
H
20
N
4
O
2
360.4091
22
12
0
0
2264285
zoom
C
21
H
20
N
4
O
2
360.4091
22
17
0
0
855341
zoom
C
21
H
20
N
4
O
2
360.4091
22
13
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement