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 124 results
Search term:
MF = 'C_{20}H_{19}N_{2}O_{4}'
1
2
3
4
5
ID
Structure
Molecular Formula
Molecular Weight
# of Data Sources
# of References
# of PubMed
# of RSC
2385397
- 0/1 defined
zoom
C
20
H
19
N
2
O
4
351.37586
7
4
0
0
369213
- 0/2 defined
zoom
C
20
H
19
N
2
O
4
351.3753
4
3
0
0
3323502
zoom
C
20
H
19
N
2
O
4
351.3753
4
2
0
0
1038950
zoom
C
20
H
19
N
2
O
4
351.3764
3
1
0
0
1167180
zoom
C
20
H
19
N
2
O
4
351.3764
3
1
0
0
9243244
zoom
C
20
H
19
N
2
O
4
351.3753
2
1
0
0
9690628
zoom
C
20
H
19
N
2
O
4
351.3753
2
1
0
0
5750601
- 1/1 defined
zoom
C
20
H
19
N
2
O
4
351.3753
2
1
0
0
5750602
- 1/1 defined
zoom
C
20
H
19
N
2
O
4
351.3753
2
1
0
0
8017033
- 3/3 defined
zoom
C
20
H
19
N
2
O
4
351.3753
2
1
0
0
8241997
zoom
C
20
H
19
N
2
O
4
351.3753
2
1
0
0
8774149
zoom
C
20
H
19
N
2
O
4
351.3753
1
1
0
0
2569314
- 0/1 defined
zoom
C
20
H
19
N
2
O
4
351.3764
1
1
0
0
3124085
zoom
C
20
H
19
N
2
O
4
351.3753
1
1
0
0
1519863
zoom
C
20
H
19
N
2
O
4
351.3764
1
1
0
0
3434545
- 0/1 defined
zoom
C
20
H
19
N
2
O
4
351.37586
1
1
0
0
3472146
- 0/2 defined
zoom
C
20
H
19
N
2
O
4
351.37586
1
1
0
0
3660081
- 0/2 defined
zoom
C
20
H
19
N
2
O
4
351.37586
1
1
0
0
4332236
zoom
C
20
H
19
N
2
O
4
351.37586
1
1
0
0
1
2
3
4
5
Advertisement
Advertisement
Spotlight
Advertisement