Disclosed are compounds of formulae (I), (II), and (II)I: and pharmaceutically acceptable salts thereof, wherein the variables, R, R.sub.1, R.sub.2, R.sub.3, R.sub.101, L, D, Q, Y, X, and Z are defined herein. These compounds are useful for treating Gram-negative bacteria infections. ##STR00001##

There are disclosed compounds that modulate or inhibit the enzymatic activity of indoleamine 2,3-dioxygenase (IDO), pharmaceutical compositions containing said compounds and methods of treating proliferative disorders, such as cancer, viral infections and/or inflammatory disorders utilizing the compounds of the disclosure.

There are disclosed compounds that modulate or inhibit the enzymatic activity of indoleamine 2,3-dioxygenase (IDO), pharmaceutical compositions containing said compounds and methods of treating proliferative disorders, such as cancer, viral infections and/or inflammatory disorders utilizing the compounds of the disclosure.

An organic compound having a spiro-anthracene core and an aromatic or heteroaromatic group and/or an amino group bonded to the core, and an organic light-emitting diode and an organic light-emitting device including the organic compound are disclosed. Since the organic compound of the present disclosure has a rigid structure and a substantially narrow full width at half maximum (FWHM), it is possible to manufacture an organic light-emitting diode and an organic light-emitting device with lowered driving voltages and enhanced luminous efficiency and color purity using the organic compound.

An organic compound having a spiro-anthracene core and an aromatic or heteroaromatic group and/or an amino group bonded to the core, and an organic light-emitting diode and an organic light-emitting device including the organic compound are disclosed. Since the organic compound of the present disclosure has a rigid structure and a substantially narrow full width at half maximum (FWHM), it is possible to manufacture an organic light-emitting diode and an organic light-emitting device with lowered driving voltages and enhanced luminous efficiency and color purity using the organic compound.

A compound according to Formula IA and IB, reversibly convertible under photochromic and electrochromic conditions between a ring-open isomer A and a ring-closed isomer B is provided. For substitutent groups, Z is N, O or S; each R.sub.1 is independently selected from the group consisting of H, or halo; each R.sub.2 is independently selected from the group consisting of H, halo, a polymer backbone, alkyl or aryl; or, when both R.sub.2 together form CHCH and form part of a polymer backbone; each R.sub.3 is independently selected from the group consisting of H, halo, alkyl, alkoxy, thioalkyl or aryl; each R.sub.4 is aryl; and each R.sub.5 is independently selected from the group consisting of H, halo, alkyl, alkoxy, thioalkyl or aryl. ##STR00001##

A compound according to Formula IA and IB, reversibly convertible under photochromic and electrochromic conditions between a ring-open isomer A and a ring-closed isomer B is provided. For substitutent groups, Z is N, O or S; each R.sub.1 is independently selected from the group consisting of H, or halo; each R.sub.2 is independently selected from the group consisting of H, halo, a polymer backbone, alkyl or aryl; or, when both R.sub.2 together form CHCH and form part of a polymer backbone; each R.sub.3 is independently selected from the group consisting of H, halo, alkyl, alkoxy, thioalkyl or aryl; each R.sub.4 is aryl; and each R.sub.5 is independently selected from the group consisting of H, halo, alkyl, alkoxy, thioalkyl or aryl. ##STR00001##

The present disclosure provides an organic light emitting element which has a pair of electrodes and an organic compound layer disposed therebetween and in which the organic compound layer contains an organic compound represented by the following general formula [1],

##STR00001##

wherein in the formula [1], Ar.sub.1 and Ar.sub.2 each independently represent an aromatic hydrocarbon group or a heteroaromatic ring group, R.sub.1 to R.sub.4 are each independently selected from a hydrogen atom or a substituent, R.sub.1 and R.sub.2 and R.sub.3 and R.sub.4 each may form a benzene ring, wherein the benzene ring may have at least one substituent.

The present disclosure provides an organic light emitting element which has a pair of electrodes and an organic compound layer disposed therebetween and in which the organic compound layer contains an organic compound represented by the following general formula [1],

##STR00001##

wherein in the formula [1], Ar.sub.1 and Ar.sub.2 each independently represent an aromatic hydrocarbon group or a heteroaromatic ring group, R.sub.1 to R.sub.4 are each independently selected from a hydrogen atom or a substituent, R.sub.1 and R.sub.2 and R.sub.3 and R.sub.4 each may form a benzene ring, wherein the benzene ring may have at least one substituent.

Peroxisome proliferator activated receptor (PPAR) compounds, and methods of using the same for treating bone fractures, treating osteoporosis and/or metabolic bone diseases, and inducing osteogenesis and/or chondrogenesis, are disclosed.