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 2153 results
Search term:
MF = 'C_{20}H_{21}NO_{3}S'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
936704
zoom
C
20
H
21
NO
3
S
355.4506
37
32
0
0
942504
zoom
C
20
H
21
NO
3
S
355.4506
30
19
0
0
915931
zoom
C
20
H
21
NO
3
S
355.4506
29
19
0
0
9145519
- 1/1 defined
zoom
C
20
H
21
NO
3
S
355.4506
28
24
0
0
2204066
- 0/2 defined
zoom
C
20
H
21
NO
3
S
355.45064
25
20
0
0
1000849
zoom
C
20
H
21
NO
3
S
355.4506
25
15
0
0
867604
zoom
C
20
H
21
NO
3
S
355.4506
25
18
0
0
970838
zoom
C
20
H
21
NO
3
S
355.4506
24
15
0
0
2203924
- 0/1 defined
zoom
C
20
H
21
NO
3
S
355.45064
24
17
0
0
1000602
zoom
C
20
H
21
NO
3
S
355.4506
23
13
0
0
866865
zoom
C
20
H
21
NO
3
S
355.4506
23
14
0
0
1148845
zoom
C
20
H
21
NO
3
S
355.4506
22
13
0
0
5050275
- 0/1 defined
zoom
C
20
H
21
NO
3
S
355.4506
22
16
0
0
29763381
- 0/1 defined
zoom
C
20
H
21
NO
3
S
355.4506
21
14
0
0
2137825
- 0/2 defined
zoom
C
20
H
21
NO
3
S
355.45064
21
16
0
0
2194886
- 0/1 defined
zoom
C
20
H
21
NO
3
S
355.45064
21
17
0
0
1534316
zoom
C
20
H
21
NO
3
S
355.4506
20
16
0
0
7555348
zoom
C
20
H
21
NO
3
S
355.4506
20
13
0
0
168854
- 0/1 defined
zoom
C
20
H
21
NO
3
S
355.4506
20
18
0
0
957102
zoom
C
20
H
21
NO
3
S
355.4506
20
13
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement