Patent ID: 11858952
Assignee: LG CHEM, LTD.
Field: Optics (Instruments)
Classification: CPC C  G | IPC C  G

Claim 4:
5. The compound according to claim 1, wherein R3 and R4 are the same as or different from each other, and each independently isopropyl group unsubstituted or substituted with CF3; a cycloalkyl group having 1 to 30 carbon atoms unsubstituted or substituted with an alkyl group; an aryl group having 6 to 30 carbon atoms unsubstituted or substituted with one or more selected from the group consisting of a halogen group, CN, CF3, —C(═O)ORa, an amine group, an alkoxy group, an alkyl group having 1 to 30 carbon atoms and a heteroaryl group having 6 to 30 carbon atoms; or a substituted or unsubstituted heteroaryl group having 6 to 30 carbon atoms, and Ra is a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group.