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 78 results
Search term:
MF = 'C_{20}H_{18}NO_{4}'
1
2
3
4
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
2263
zoom
C
20
H
18
NO
4
336.3607
61
813
1575
672
141335
zoom
C
20
H
18
NO
4
336.3607
11
14
0
0
432598
zoom
C
20
H
18
NO
4
336.3607
7
5
0
0
139705
zoom
C
20
H
18
NO
4
336.3607
6
5
0
0
432575
zoom
C
20
H
18
NO
4
336.3607
6
4
0
0
8149793
zoom
C
20
H
18
NO
4
336.3607
3
2
0
0
149770
zoom
C
20
H
18
NO
4
336.3607
3
3
0
0
436027
zoom
C
20
H
18
NO
4
336.3607
3
2
0
0
1034174
zoom
C
20
H
18
NO
4
336.3618
3
1
0
0
25048525
zoom
C
20
H
18
NO
4
336.3607
2
2
0
0
8081446
zoom
C
20
H
18
NO
4
336.3607
2
1
0
0
25049107
zoom
C
20
H
18
NO
4
336.3607
1
1
0
0
3932052
zoom
C
20
H
18
NO
4
336.3618
1
1
0
0
4164148
zoom
C
20
H
18
NO
4
336.36122
1
1
0
0
4276307
zoom
C
20
H
18
NO
4
336.36122
1
1
0
0
4359160
zoom
C
20
H
18
NO
4
336.36122
1
1
0
0
5030086
- 4/4 defined
zoom
C
20
H
18
NO
4
336.3618
1
1
0
0
5294532
zoom
C
20
H
18
NO
4
336.36122
1
1
0
0
5312843
- 1/1 defined
zoom
C
20
H
18
NO
4
336.36122
1
1
0
0
5312844
- 1/1 defined
zoom
C
20
H
18
NO
4
336.36122
1
1
0
0
1
2
3
4
Advertisement
Advertisement
Spotlight
Advertisement