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 3994 results
Search term:
MF = 'C_{18}H_{21}N_{5}O_{2}S'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
20578901
zoom
C
18
H
21
N
5
O
2
S
371.4566
88
65
0
0
4576536
zoom
C
18
H
21
N
5
O
2
S
371.4566
31
55
0
0
851740
zoom
C
18
H
21
N
5
O
2
S
371.4566
28
15
0
0
922563
zoom
C
18
H
21
N
5
O
2
S
371.4566
27
16
0
0
580057
zoom
C
18
H
21
N
5
O
2
S
371.4566
25
16
0
0
1288416
zoom
C
18
H
21
N
5
O
2
S
371.4566
24
15
0
0
4986351
zoom
C
18
H
21
N
5
O
2
S
371.4566
24
15
0
0
4986355
zoom
C
18
H
21
N
5
O
2
S
371.4566
24
16
0
0
1520121
zoom
C
18
H
21
N
5
O
2
S
371.4566
24
15
0
0
1113797
zoom
C
18
H
21
N
5
O
2
S
371.4566
23
15
0
0
3048877
zoom
C
18
H
21
N
5
O
2
S
371.45664
21
12
0
0
4453615
zoom
C
18
H
21
N
5
O
2
S
371.45664
21
14
0
0
4974033
zoom
C
18
H
21
N
5
O
2
S
371.4566
21
12
0
0
12276402
zoom
C
18
H
21
N
5
O
2
S
371.4566
20
19
0
0
4453623
zoom
C
18
H
21
N
5
O
2
S
371.45664
20
14
0
0
2239810
- 0/3 defined
zoom
C
18
H
21
N
5
O
2
S
371.45664
20
17
0
0
1062398
zoom
C
18
H
21
N
5
O
2
S
371.4566
20
12
0
0
1082759
zoom
C
18
H
21
N
5
O
2
S
371.4566
19
15
0
0
1512472
zoom
C
18
H
21
N
5
O
2
S
371.4566
19
10
0
0
21524426
zoom
C
18
H
21
N
5
O
2
S
371.4566
19
14
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement