About
Login
Search
Services
Support
Contact Us
Simple Search
Structure Search
LASSO Search
Advanced LASSO
Chemical Elements
Properties Search
Predicted Properties
Data Slice Search
Literature Search
NCBI Entrez Search
PubChem Search
Advanced Search
Searches History
Advertisements
Systematic Name, Synonym, Trade Name,
Registry Number, SMILES, InChI or CSID
Options
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 spectra associated
Filter only those having patents link
Search Hits Limit
No Limit
10
100
1000
10000
Searching...
1430 hits found in 0.64 seconds.
Search terms: C21H21NO2
Found by empirical formula
Grid
Tile
Table
Record
ChemRefer
Entrez
PubChem
1
2
3
4
5
6
7
8
9
10
...
ID
Structure
Empirical Formula
Molecular Weight
# of Data Sources
# of References
45922
zoom
C
21
H
21
NO
2
319.3969
1
1
54555
zoom
C
21
H
21
NO
2
319.3969
4
4
100797
zoom
C
21
H
21
NO
2
319.3969
2
2
112000
zoom
C
21
H
21
NO
2
319.3969
7
7
113923
zoom
C
21
H
21
NO
2
319.3969
9
11
131611
zoom
C
21
H
21
NO
2
319.3969
2
2
131919
zoom
C
21
H
21
NO
2
319.3969
4
5
131924
zoom
C
21
H
21
NO
2
319.3969
1
1
132570
zoom
C
21
H
21
NO
2
319.3969
4
5
132574
zoom
C
21
H
21
NO
2
319.3969
6
7
132576
zoom
C
21
H
21
NO
2
319.3969
4
5
157676
zoom
C
21
H
21
NO
2
319.3969
4
4
178536
zoom
C
21
H
21
NO
2
319.3969
5
6
178615
zoom
C
21
H
21
NO
2
319.3969
4
4
186930
zoom
C
21
H
21
NO
2
319.3969
5
6
196054
zoom
C
21
H
21
NO
2
319.3969
3
3
204181
zoom
C
21
H
21
NO
2
319.3969
4
4
216100
zoom
C
21
H
21
NO
2
319.3969
4
4
217345
zoom
C
21
H
21
NO
2
319.3969
3
3
223378
zoom
C
21
H
21
NO
2
319.3969
5
5
1
2
3
4
5
6
7
8
9
10
...