Top IPC subclasses
1
|
C07F
|
6
|
acyclic, carbocyclic, or heterocyclic compounds containing elements other than carbon, hydrogen, hal
|
2
|
C07D
|
4
|
Heterocyclic compounds
|
3
|
C07B
|
2
|
General methods of organic chemistry; apparatus therefor
|
4
|
C07C
|
1
|
Acyclic or carbocyclic compounds
|