To improve the emission efficiency, the driving voltage and the lifetime of an organic light-emitting device using a delayed fluorescent material. A host material for a delayed fluorescent material, containing a compound represented by the following general formula: R.sup.1 to R.sup.5 each are a substituent not containing a cyano group. n1 to n5 each are 0 to 4, Ar is a monocyclic arylene group or a monocyclic heteroarylene group.

##STR00001##

The present invention relates to compounds suitable for use in electronic devices, and to electronic devices, especially organic electroluminescent devices, comprising these compounds.

The present invention relates to compounds suitable for use in electronic devices, and to electronic devices, especially organic electroluminescent devices, comprising these compounds.

This invention relates to particular substituted heterocycle fused gamma-carbolines, their prodrugs, in free, solid, pharmaceutically acceptable salt and/or substantially pure form as described herein, pharmaceutical compositions thereof, and methods of use in the treatment of diseases involving 5-HT.sub.2A receptor, serotonin transporter (SERT) and/or pathways involving dopamine D.sub.1/D.sub.2 receptor signaling systems, and/or the treatment of residual symptoms.

This invention relates to particular substituted heterocycle fused gamma-carbolines, their prodrugs, in free, solid, pharmaceutically acceptable salt and/or substantially pure form as described herein, pharmaceutical compositions thereof, and methods of use in the treatment of diseases involving 5-HT.sub.2A receptor, serotonin transporter (SERT) and/or pathways involving dopamine D.sub.1/D.sub.2 receptor signaling systems, and/or the treatment of residual symptoms.

A condensed-cyclic compound is represented by Formula 1, and an organic light-emitting diode includes the condensed-cyclic compound. The organic light-emitting diode includes a first electrode, a second electrode facing the first electrode, and an organic layer. The organic layer includes an emission layer and the condensed-cyclic compound. The condensed-cyclic compound can be included in the emission layer as a host, and the emission layer may further include a dopant. ##STR00001##

A condensed-cyclic compound is represented by Formula 1, and an organic light-emitting diode includes the condensed-cyclic compound. The organic light-emitting diode includes a first electrode, a second electrode facing the first electrode, and an organic layer. The organic layer includes an emission layer and the condensed-cyclic compound. The condensed-cyclic compound can be included in the emission layer as a host, and the emission layer may further include a dopant. ##STR00001##

An organic compound represented by the formula [1]:

##STR00001##

R.sub.1 to R.sub.19 are independently selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, and a substituent, and R.sub.9 and R.sub.19 are optionally bonded together. When R.sub.9 and R.sub.19 are bonded together, the bonding is selected from the group consisting of direct bonding, bonding via an oxygen atom or a sulfur atom, and bonding via CR.sub.20R.sub.21. R.sub.20 and R.sub.21 independently have the same meaning as R.sub.1 to R.sub.19. X.sub.1 and X.sub.2 independently denote an oxygen atom, a sulfur atom, CR.sub.20R.sub.21, or a single bond. Ar denotes an aromatic hydrocarbon group or a heterocyclic group, n denotes an integer in the range of 0 to 2, and m denotes an integer in the range of 1 to 4. When n is 0, any one of R.sub.1 to R.sub.8 is directly bonded to any one of R.sub.9 to R.sub.19.

An organic compound represented by the formula [1]:

##STR00001##

R.sub.1 to R.sub.19 are independently selected from the group consisting of a hydrogen atom, a deuterium atom, a halogen atom, and a substituent, and R.sub.9 and R.sub.19 are optionally bonded together. When R.sub.9 and R.sub.19 are bonded together, the bonding is selected from the group consisting of direct bonding, bonding via an oxygen atom or a sulfur atom, and bonding via CR.sub.20R.sub.21. R.sub.20 and R.sub.21 independently have the same meaning as R.sub.1 to R.sub.19. X.sub.1 and X.sub.2 independently denote an oxygen atom, a sulfur atom, CR.sub.20R.sub.21, or a single bond. Ar denotes an aromatic hydrocarbon group or a heterocyclic group, n denotes an integer in the range of 0 to 2, and m denotes an integer in the range of 1 to 4. When n is 0, any one of R.sub.1 to R.sub.8 is directly bonded to any one of R.sub.9 to R.sub.19.

The invention relates to pharmaceutical compositions comprising, compounds of Formula Q: ##STR00001##
wherein W is —N(H)—, or —N(CH.sub.3)—, and Y is —C(═O)— or —O—, in free base or pharmaceutically acceptable salt form, and methods of use in the treatment of diseases involving 5-HT.sub.2A receptor, serotonin transporter (SERT) pathway and/or the dopamine D.sub.2 receptor pathway, and methods of treating conditions of the central nervous system therewith.