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 disclosure relates to novel compounds including formula (X) and pharmaceutical compositions thereof, and methods for inhibiting the activity of SHP2 phosphatase with the compounds and compositions of the disclosure. The present disclosure further relates to, but is not limited to, methods for treating disorders associated with SHP2 deregulation with the compounds and compositions of the disclosure.

##STR00001##

The present disclosure relates to novel compounds including formula (X) and pharmaceutical compositions thereof, and methods for inhibiting the activity of SHP2 phosphatase with the compounds and compositions of the disclosure. The present disclosure further relates to, but is not limited to, methods for treating disorders associated with SHP2 deregulation with the compounds and compositions of the disclosure.

##STR00001##

Provided in the present invention are a heteroaromatic acetamide derivative and the preparation and the use thereof, wherein the heteroaromatic acetamide derivative is a heteroaromatic acetamide compound as shown in general formula (I), or a pharmaceutically acceptable salt and/or solvate thereof. According to the present invention, experiments have confirmed that the heteroaromatic acetamide derivative of the present invention can specifically bind to transient receptor potential ankyrin 1 (TRPA1) and inhibit or reduce the activity thereof, and can be used for treating diseases mediated by TRPA1. The present invention further provides a method for preparing the heteroaromatic acetamide derivative, and a drug and pharmaceutical composition containing the heteroaromatic acetamide derivative.

##STR00001##

Provided in the present invention are a heteroaromatic acetamide derivative and the preparation and the use thereof, wherein the heteroaromatic acetamide derivative is a heteroaromatic acetamide compound as shown in general formula (I), or a pharmaceutically acceptable salt and/or solvate thereof. According to the present invention, experiments have confirmed that the heteroaromatic acetamide derivative of the present invention can specifically bind to transient receptor potential ankyrin 1 (TRPA1) and inhibit or reduce the activity thereof, and can be used for treating diseases mediated by TRPA1. The present invention further provides a method for preparing the heteroaromatic acetamide derivative, and a drug and pharmaceutical composition containing the heteroaromatic acetamide derivative.

##STR00001##

The present invention relates to soluble organic compounds, to compositions comprising these compounds, to formulations comprising the compounds or compositions, and to electronic devices.

The present invention relates to soluble organic compounds, to compositions comprising these compounds, to formulations comprising the compounds or compositions, and to electronic devices.

The problem to be solved by the present invention is to provide a compound suitable for a pharmaceutical composition, specifically an agent for treating nocturia.

The inventors have assumed that inhibition of nocturnal activity of placental leucine aminopeptidase (P-LAP), i.e. aminopeptidase that cleaves AVP, would maintain and/or increase an endogenous AVP level to enhance the antidiuretic effect, which would contribute to a decreased number of nocturnal voids, and have extensively studied compounds which inhibit P-LAP. As a result, the inventors have found that (2R)-3-amino-2-(pyridylmethyl)-2-hydroxy-propanoic acid derivatives have excellent P-LAP inhibitory activity. The inventors have evaluated antidiuretic effects in water-loaded rats and have found that the compounds increase endogenous AVP levels by inhibiting P-LAP and consequently reduce urine production. The present invention therefore provides compounds expected to be used as an agent for treating nocturia based on P-LAP inhibition.

The problem to be solved by the present invention is to provide a compound suitable for a pharmaceutical composition, specifically an agent for treating nocturia.

The inventors have assumed that inhibition of nocturnal activity of placental leucine aminopeptidase (P-LAP), i.e. aminopeptidase that cleaves AVP, would maintain and/or increase an endogenous AVP level to enhance the antidiuretic effect, which would contribute to a decreased number of nocturnal voids, and have extensively studied compounds which inhibit P-LAP. As a result, the inventors have found that (2R)-3-amino-2-(pyridylmethyl)-2-hydroxy-propanoic acid derivatives have excellent P-LAP inhibitory activity. The inventors have evaluated antidiuretic effects in water-loaded rats and have found that the compounds increase endogenous AVP levels by inhibiting P-LAP and consequently reduce urine production. The present invention therefore provides compounds expected to be used as an agent for treating nocturia based on P-LAP inhibition.

Disclosed are methods for performing dynamic nuclear polarization using the polarizing agents described herein. In general, the methods involve (a) providing a frozen sample in a magnetic field, wherein the frozen sample includes a polarizing agent described herein and an analyte with at least one spin half nucleus; (b) polarizing the at least one spin half nucleus of the analyte by irradiating the frozen sample with radiation having a frequency that excites electron spin transitions in the polarizing agent; (c) optionally melting the sample to produce a molten sample; and (d) detecting nuclear spin transitions in the at least one spin half nucleus of the analyte in the frozen or molten sample. In certain embodiments, the polarizing agents can be peptide-based. In these embodiments, the polarizing agents can be readily prepared by solid-phase peptide synthesis.