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 2195 results
Search term:
MF = 'C_{20}H_{21}ClN_{2}O_{5}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
2144679
- 0/1 defined
zoom
C
20
H
21
ClN
2
O
5
404.84414
26
19
0
0
1276385
zoom
C
20
H
21
ClN
2
O
5
404.8441
25
14
0
0
1289669
zoom
C
20
H
21
ClN
2
O
5
404.8441
25
14
0
0
2414831
zoom
C
20
H
21
ClN
2
O
5
404.8441
24
13
0
0
1109579
zoom
C
20
H
21
ClN
2
O
5
404.8441
24
16
0
0
4993638
- 0/1 defined
zoom
C
20
H
21
ClN
2
O
5
404.8441
21
16
0
0
6782713
zoom
C
20
H
21
ClN
2
O
5
404.8441
20
15
0
0
4998058
- 0/1 defined
zoom
C
20
H
21
ClN
2
O
5
404.8441
19
14
0
0
5656776
zoom
C
20
H
21
ClN
2
O
5
404.8441
19
13
0
0
2486769
- 0/4 defined
zoom
C
20
H
21
ClN
2
O
5
404.8441
19
13
0
0
1289299
zoom
C
20
H
21
ClN
2
O
5
404.8441
19
11
0
0
5657086
zoom
C
20
H
21
ClN
2
O
5
404.8441
18
10
0
0
12274453
- 0/1 defined
zoom
C
20
H
21
ClN
2
O
5
404.8441
18
10
0
0
17534192
- 0/1 defined
zoom
C
20
H
21
ClN
2
O
5
404.8441
17
12
0
0
2751464
- 0/1 defined
zoom
C
20
H
21
ClN
2
O
5
404.84414
17
12
0
0
4098227
- 0/1 defined
zoom
C
20
H
21
ClN
2
O
5
404.84414
17
12
0
0
4099587
- 0/1 defined
zoom
C
20
H
21
ClN
2
O
5
404.84414
17
13
0
0
4097704
- 0/1 defined
zoom
C
20
H
21
ClN
2
O
5
404.84414
16
11
0
0
1763800
zoom
C
20
H
21
ClN
2
O
5
404.8441
16
11
0
0
2604186
zoom
C
20
H
21
ClN
2
O
5
404.8441
16
11
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement