Abstract: The present invention relates to an organic light-emitting device employing, as a host of a light emission layer, an anthracene derivative compound having a characteristic structure by introduction of a benzofuran structure into the anthracene backbone, and as a dopant of the light emission layer, a polycyclic compound having a characteristic structure. The organic light-emitting device according to the present invention is an organic light-emitting device with significantly improved external quantum efficiency and can be advantageously utilized not only for lighting devices but also for various display devices, such as flat, flexible, and wearable displays.

Abstract: The present invention relates to: a pyrene derivative compound having a specific structure; and a high efficiency organic light-emitting device employing the pyrene derivative compound in a light emitting layer and thus having excellent light-emitting characteristics. The organic light-emitting device according to the present invention can be configured as a high efficiency organic light-emitting device having excellent light-emitting characteristics by employing the pyrene derivative compound having the specific structure as a host in the light emitting layer, and thus can be usefully applied industrially in lighting devices, as well as various display devices such as flat, flexible, and wearable displays.

Abstract: An organic light-emitting device according to the present invention uses a pyrene derivative compound having a characteristic structure as a host in a light-emitting layer to realize a long-lifespan and high-efficiency organic light-emitting device having excellent light-emitting characteristics in terms of lifespan and luminescence efficiency. Accordingly, the organic light-emitting device can be usefully applied, in the industrial aspect, for various display devices such as flat panel, flexible, and wearable displays, as well as lighting devices.

Abstract: The present invention relates to a novel heterocyclic compound usable in an organic light-emitting device and to an organic light-emitting device comprising same, wherein [chemical formula A] is as described in the detailed description of the invention.

Abstract: Disclosed is a polycyclic aromatic compound that can be employed in an organic layer of an organic electroluminescent device. Also disclosed is a highly efficient organic electroluminescent device including the polycyclic aromatic compound. The use of the polycyclic aromatic compound significantly improves the luminous efficiency of the device.

Abstract: The present invention is directed to a pharmaceutical composition comprising an extract of a mixture of Anemarrhena Rhizoma, a member of the family Liliaceae and, Phellodendron bark, a member of the family Rutaceae that produces analgesic and anti-inflammatory effects, and its preparing method. The present invention is applicable to act on inflammation and pain, for example, chronic gastritis, arthralgia, benign prostate hyperplasia, chronic and recurrent cystitis, cervical disc, degenerative joint arthritis, rheumatoid arthritis, tennis elbow, osteoportotic pain, migraine, diabetic neuropathy pain, right flank pain, etc. The present invention a crude extract suitable for long-period administration with less side effects. Also, the present invention does not lead to dependency or resistance.

Abstract: The present invention relates to a pharmaceutical composition for the treatment of hepatitis C which comprises a mixed extract, particularly a mixed aqueous extract or a mixed alcohol extract, of Phellodendron amurense RUPRECHT cortex and Patrinia scabiosaefolia FISCH. as an active ingredient. The mixed extract according to the present invention exhibits an anti-viral activity for hepatitis C and help prevents hepatic cirrhosis orginated from hepatitis C, and further treats hepatitis and hepatic cirrhosis by potentiating the immunological function to inhibit the proliferation of hepatitis C virus and stimulating the proliferation of T helper cells to increase the host immune system. Furthermore, the mixed extract of the present invention is a mixed extract of natural plants characterized in that it does not exhibit any side effects nor drug resistance, and its activity is maintained even when used for a long period.

Abstract: The present invention relates to an anti-cancer composition containing acridine derivatives and guanosine compounds. In the composition of the present invention, the acridine derivative and the guanosine compound are present in the weight ratio of 1:0.1-5.0, preferably 1:0.3-3.0 and more preferably 1:0.5-1.5. In the composition of the present invention, most preferably the acridine derivative is acriflavine neutral and the guanosine compound is guanosine hydrate. Although acridine derivatives and guanosine compounds used as an active ingredient in the present composition have substantially no anti-cancer effect when they are used individually, the combination of acriflavine neutral and guanosine hydrate which potentiates the effect of acriflavine neutral, i.e. the composition(AG60) according to the present invention, exhibits reduced toxicity and increased anti-cancer effect in comparison to the use of acriflavine neutral or guanosine hydrate alone.