The present invention relates to certain fluorenes, to the use of the compounds in an electronic device, and to an electronic device comprising at least one of these compounds. The present invention furthermore relates to a process for the preparation of the compounds and to a formulation and composition comprising one or more of the compounds.

The present invention relates to certain fluorenes, to the use of the compounds in an electronic device, and to an electronic device comprising at least one of these compounds. The present invention furthermore relates to a process for the preparation of the compounds and to a formulation and composition comprising one or more of the compounds.

A series of PRMT5 inhibitor compounds are described. The compounds are useful as PRMT5 inhibitor compounds and in the treatment of PRMT5 mediated diseases, disorders, and symptoms thereof.

A series of PRMT5 inhibitor compounds are described. The compounds are useful as PRMT5 inhibitor compounds and in the treatment of PRMT5 mediated diseases, disorders, and symptoms thereof.

The present disclosure relates to an organic compound. The structure of the organic compound consists of a structure represented by formula (I) and a structure represented by formula (II); the structure represented by formula (I) is fused with the structure represented by formula (II); and * represents a connection point, in formula (I), capable of being fused with formula (II). When being used to the organic light-emitting layer of an organic electroluminescent device, the organic compound of the present application can effectively improve the device efficiency of the device and prolong the service life of the organic electroluminescent device.

##STR00001##

An organic compound and an organic light emitting device including the same are disclosed. For example, an organic compound is represented by the following chemical formula in which one of X1 and X2 is N, and the other one of X1 and X2 is O or S. The organic light emitting diode and the organic light emitting device each includes the organic compound.

##STR00001##

A light emitting element that includes a first electrode, a second electrode on the first electrode, an emission layer between the first electrode and the second electrode, and a hole transport region which is between the first electrode and the emission layer is provided. The emission layer includes an amine compound represented by Formula 1:

##STR00001##

A heterocyclic compound represented by Formula 1, a composition including the same, and an organic light-emitting device including the heterocyclic compound: ##STR00001## L.sub.1 to L.sub.4, L.sub.11, a1 to a4, a11, Ar.sub.1, Ar.sub.2, Ar.sub.11, R.sub.1 to R.sub.7, R.sub.11 to R.sub.12, b1 to b7, and b11 to b12 are described in the specification.

Organic electroluminescent devices with lowered driving voltages, and enhanced efficiencies and lifetimes are provided.

Organic electroluminescent devices with lowered driving voltages, and enhanced efficiencies and lifetimes are provided.