The present application relates to a nitrogen-containing compound. The structural formula of the nitrogen-containing compound is as shown in a Formula 1, in which a ring A and a ring B are each independently selected from a benzene ring or a fused aromatic ring with 10 to 14 ring-forming carbon atoms, and at least one of the ring A and the ring B is selected from the fused aromatic ring with 10 to 14 ring-forming carbon atoms; L is selected from a single bond, a substituted or unsubstituted arylene group with 6 to 30 carbon atoms, and a substituted or unsubstituted heteroarylene group with 3 to 30 carbon atoms; and Het is a substituted or unsubstituted nitrogen-containing heteroaryl group with 3 to 30 carbon atoms. The nitrogen-containing compound of the present application can improve the luminous efficiency of an organic electroluminescent device and the conversion efficiency of a photoelectric conversion device using the nitrogen-containing compound. ##STR00001##

The present application relates to a nitrogen-containing compound. The structural formula of the nitrogen-containing compound is as shown in a Formula 1, in which a ring A and a ring B are each independently selected from a benzene ring or a fused aromatic ring with 10 to 14 ring-forming carbon atoms, and at least one of the ring A and the ring B is selected from the fused aromatic ring with 10 to 14 ring-forming carbon atoms; L is selected from a single bond, a substituted or unsubstituted arylene group with 6 to 30 carbon atoms, and a substituted or unsubstituted heteroarylene group with 3 to 30 carbon atoms; and Het is a substituted or unsubstituted nitrogen-containing heteroaryl group with 3 to 30 carbon atoms. The nitrogen-containing compound of the present application can improve the luminous efficiency of an organic electroluminescent device and the conversion efficiency of a photoelectric conversion device using the nitrogen-containing compound. ##STR00001##

The present specification provides crystalline forms of 4-[3-(3-[(cyclopropylamino)methyl]azetidine-1-carbonyl)-4-fluorobenzyl]phthalazin-1(2H)-one hydrochloride, methods of preparing the same, and pharmaceutical compositions comprising the same.

The present specification provides crystalline forms of 4-[3-(3-[(cyclopropylamino)methyl]azetidine-1-carbonyl)-4-fluorobenzyl]phthalazin-1(2H)-one hydrochloride, methods of preparing the same, and pharmaceutical compositions comprising the same.

The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising the specific combination of compounds according to the present disclosure as a plurality of host materials according to the present disclosure, it is possible to provide an organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifetime property compared to the conventional organic electroluminescent devices.

The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising the specific combination of compounds according to the present disclosure as a plurality of host materials according to the present disclosure, it is possible to provide an organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifetime property compared to the conventional organic electroluminescent devices.

This invention relates to pyrimidine derivatives, processes for their preparation, pharmaceutical compositions, and their use in treating viral infections such as HCV or HBV.

This invention relates to pyrimidine derivatives, processes for their preparation, pharmaceutical compositions, and their use in treating viral infections such as HCV or HBV.

The present disclosure provides compounds of Formula (I) or (II), pharmaceutically acceptable salt, isotopic variant, stereoisomer, or a mixture thereof. Also provided are pharmaceutical compositions comprising a compound, methods of treating a poly(ADP-ribose)polymerase-1-mediated disease or disorder in a subject, methods of detecting a poly(ADP-ribose)polymerase-1-mediated neurodegenerative disease or disorder, or methods of monitoring cancer treatment in a subject. In some embodiments, the poly(ADP-ribose)polymerase-1-mediated disease or disorder is a neurodegenerative disease or cancer. ##STR00001##

The present disclosure provides compounds of Formula (I) or (II), pharmaceutically acceptable salt, isotopic variant, stereoisomer, or a mixture thereof. Also provided are pharmaceutical compositions comprising a compound, methods of treating a poly(ADP-ribose)polymerase-1-mediated disease or disorder in a subject, methods of detecting a poly(ADP-ribose)polymerase-1-mediated neurodegenerative disease or disorder, or methods of monitoring cancer treatment in a subject. In some embodiments, the poly(ADP-ribose)polymerase-1-mediated disease or disorder is a neurodegenerative disease or cancer. ##STR00001##