Patent ID: 11970508
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 4:
5. The compound of claim 1, wherein one of the following is true:
(1) the multicyclic fused ring system of A1 and/or A2 is a triple ring system;
(2) the multicyclic fused ring system of A1 and/or A2 is a triple ring system and the triple ring system comprises three 6-membered rings;
(3) the multicyclic fused ring system of A1 and/or A2 is a triple ring system and the triple ring system comprises two 6-membered ring and one 5-membered ring; and
(4) the multicyclic fused ring system of A1 and/or A2 is a triple ring system and the triple ring system comprises one 6-membered ring and two 5-membered rings.