Oblon, McClelland, Maier & Neustadt, L.L.P.
Oxygen-containing fused ring derivative and organic electroluminescence device comprising the same
An oxygen-containing fused ring derivative represented by the following formula (1) wherein Ar1 is an m-valent fused ring group in which four or more rings including one or more rings selected from a furan ring and a pyran ring are fused and HAr is any of the nitrogen-containing heterocyclic group represented by the following formulas (2) to (5):
IDEMITSU KOSAN CO., LTD.
H H H C C H C C H H H H H H
H01L H01L H01L C07D C09K H01L C07D C09K H05B H01L H01L H01L H01L H01L
inventional inventional additional inventional inventional inventional inventional additional inventional additional additional additional additional additional
Hirokatsu Yumiko Hiroyuki Masahiro Yuichiro
Ito Mizuki Saito Kawamura Kawamura