CPC Class Codes
C07D 209/56
Ring systems containing thr...
C07D 307/91
Dibenzofurans; Hydrogenated...
C07D 405/04
directly linked by a ring-m...
C07D 405/14
containing three or more he...
C07D 409/04
directly linked by a ring-m...
C07D 519/00
Heterocyclic compounds cont...
C07F 7/0812
comprising a heterocyclic ring
C09K 11/06
containing organic luminesc...
H10K 50/11
characterised by the electr...
H10K 50/15
Hole transporting layers
H10K 50/16
Electron transporting layers
H10K 50/171
Electron injection layers
H10K 85/40
Organosilicon compounds, e....
H10K 85/615
Polycyclic condensed aromat...
H10K 85/636
comprising heteroaromatic h...
H10K 85/6572
comprising only nitrogen in...
H10K 85/6574
comprising only oxygen in t...
H10K 85/6576
comprising only sulfur in t...