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 6007 results
Search term:
MF = 'C_{21}H_{21}N_{3}O_{2}S'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
28510573
- 1/1 defined
zoom
C
21
H
21
N
3
O
2
S
379.4753
54
52
0
0
891167
zoom
C
21
H
21
N
3
O
2
S
379.4753
36
26
0
0
858245
zoom
C
21
H
21
N
3
O
2
S
379.4753
28
18
0
0
1107177
zoom
C
21
H
21
N
3
O
2
S
379.4753
27
23
0
0
2219887
- 0/1 defined
zoom
C
21
H
21
N
3
O
2
S
379.47534
26
21
0
0
1076102
zoom
C
21
H
21
N
3
O
2
S
379.4753
26
16
0
0
1041964
zoom
C
21
H
21
N
3
O
2
S
379.4753
25
14
0
0
1051130
zoom
C
21
H
21
N
3
O
2
S
379.4753
25
14
0
0
1061384
zoom
C
21
H
21
N
3
O
2
S
379.4753
25
18
0
0
500070
zoom
C
21
H
21
N
3
O
2
S
379.4753
25
17
0
0
1162164
zoom
C
21
H
21
N
3
O
2
S
379.4753
25
17
0
0
1080270
zoom
C
21
H
21
N
3
O
2
S
379.4753
24
18
0
0
1095710
zoom
C
21
H
21
N
3
O
2
S
379.4753
24
17
0
0
921461
zoom
C
21
H
21
N
3
O
2
S
379.4753
23
15
0
0
1715453
zoom
C
21
H
21
N
3
O
2
S
379.4753
23
17
0
0
1834019
zoom
C
21
H
21
N
3
O
2
S
379.4753
23
16
0
0
2113014
- 0/1 defined
zoom
C
21
H
21
N
3
O
2
S
379.47534
23
14
0
0
1651754
zoom
C
21
H
21
N
3
O
2
S
379.4753
22
15
0
0
1675346
zoom
C
21
H
21
N
3
O
2
S
379.4753
22
14
0
0
864497
zoom
C
21
H
21
N
3
O
2
S
379.4753
22
18
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement