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 1187 results
Search term:
MF = 'C_{20}H_{19}ClN_{4}O_{4}S'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
893520
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
29
13
0
0
1684225
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
29
15
0
0
1275038
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
27
18
0
0
921566
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
24
14
0
0
854603
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
23
17
0
0
982983
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
23
12
0
0
999914
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
23
13
0
0
2204138
- 0/1 defined
zoom
C
20
H
19
ClN
4
O
4
S
446.90726
23
18
0
0
2212206
- 0/1 defined
zoom
C
20
H
19
ClN
4
O
4
S
446.90726
20
16
0
0
17724157
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
20
14
0
0
1000518
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
20
12
0
0
578947
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
20
13
0
0
982979
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
19
11
0
0
4997920
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
19
12
0
0
11678895
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
18
14
0
0
4172506
zoom
C
20
H
19
ClN
4
O
4
S
446.90726
18
13
0
0
4985729
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
17
11
0
0
4996420
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
17
11
0
0
17529968
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
17
11
0
0
1054419
zoom
C
20
H
19
ClN
4
O
4
S
446.9073
17
13
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement