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 861 results
Search term:
MF = 'C_{21}H_{17}ClN_{4}O_{3}S'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
1021958
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
23
16
0
0
1055999
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
23
16
0
0
851334
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
23
13
0
0
1145979
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
21
15
0
0
25185684
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
20
19
0
0
11882625
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
18
12
0
0
11882626
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
18
14
0
0
1163579
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
18
14
0
0
1166688
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
18
13
0
0
1179784
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
18
14
0
0
858010
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
18
12
0
0
1519380
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
17
13
0
0
4464778
- 0/1 defined
zoom
C
21
H
17
ClN
4
O
3
S
440.90268
17
13
0
0
13143676
- 0/1 defined
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
17
12
0
0
4464447
- 0/1 defined
zoom
C
21
H
17
ClN
4
O
3
S
440.90268
16
12
0
0
931089
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
16
8
0
0
944500
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
16
10
0
0
1453131
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
16
12
0
0
1457266
zoom
C
21
H
17
ClN
4
O
3
S
440.9027
16
12
0
0
4455134
zoom
C
21
H
17
ClN
4
O
3
S
440.90268
15
9
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement