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 801 results
Search term:
MF = 'C_{21}H_{20}N_{4}O_{4}S_{2}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
576486
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
26
29
0
0
1479034
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
25
29
0
0
2235808
- 0/1 defined
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
25
32
0
0
1298780
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
24
29
0
0
1296679
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
23
27
0
0
1096428
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
21
22
0
0
2182368
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
21
24
0
0
1140303
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
20
24
0
0
1648068
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
20
24
0
0
3136535
- 0/1 defined
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
20
22
0
0
2932900
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
19
22
0
0
2094987
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
19
20
0
0
1055150
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
19
21
0
0
1499874
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
19
21
0
0
1509811
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
19
21
0
0
1608890
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
19
23
0
0
2182323
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
18
20
0
0
3049060
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
18
23
0
0
11990616
- 0/1 defined
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
18
20
0
0
12801005
zoom
C
21
H
20
N
4
O
4
S
2
456.5379
18
21
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement