The present invention relates to the field of medicine. More specifically, the present invention relates to compounds that are sigma-1 receptor agonists and their use for the treatment of central nervous system disorders, including cognitive or neurodegenerative disorders, such as Alzheimer's disease, Parkinson's disease, Huntington's disease, Amyotrophic lateral sclerosis, and multiple sclerosis.

A polycrystalline form of a dehydrophenylahistin-like compound, and a manufacturing and purification method and application thereof. A (3Z,6Z)-3-benzylidene-6-[(5-tert-butyl-1H-imidazol-4-yl)deuteromethylene]piperazine-2,5-dione monohydrate crystal and a (3Z,6Z)-3-benzylidene-6-[(5-tert-butyl-1H-imidazol-4-yl)methylene]piperazine-2,5-dione monohydrate crystal are more competitive crystalline forms with stable quality. The manufacturing and purification method is simple and easy to operate, and can effectively control the generation of a trans-isomer contaminant to obtain a high purity product. The polycrystalline form of the dehydrophenylahistin-like compound has a certain value in an application for manufacturing an antitumor pharmaceutical product.

A polycrystalline form of a dehydrophenylahistin-like compound, and a manufacturing and purification method and application thereof. A (3Z,6Z)-3-benzylidene-6-[(5-tert-butyl-1H-imidazol-4-yl)deuteromethylene]piperazine-2,5-dione monohydrate crystal and a (3Z,6Z)-3-benzylidene-6-[(5-tert-butyl-1H-imidazol-4-yl)methylene]piperazine-2,5-dione monohydrate crystal are more competitive crystalline forms with stable quality. The manufacturing and purification method is simple and easy to operate, and can effectively control the generation of a trans-isomer contaminant to obtain a high purity product. The polycrystalline form of the dehydrophenylahistin-like compound has a certain value in an application for manufacturing an antitumor pharmaceutical product.

The present invention provides compounds for inhibiting matriptase 2, or a mutant thereof, and compositions and methods of use thereof.

Described herein are compounds of Formula (I), polymers and implantable elements comprising compounds of Formula (II), and compositions and methods of use thereof. In particular, the compounds, modified polymers, implantable elements and related compositions may be used in methods for the prevention and treatment of a disease, disorder or condition in a subject.

Described herein are compounds of Formula (I), polymers and implantable elements comprising compounds of Formula (II), and compositions and methods of use thereof. In particular, the compounds, modified polymers, implantable elements and related compositions may be used in methods for the prevention and treatment of a disease, disorder or condition in a subject.

Provided herein are compounds that bind to BF3 of an androgen receptor (AR), which can modulate the AR for the treatment of Kennedy's disease

Provided herein are compounds of Formula (I), or pharmaceutically acceptable salt thereof, wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.8, R.sub.9, X, Y, Z, W, and m are defined herein. Also provided herein are pharmaceutical compositions comprising a compound of Formula (I) or pharmaceutically acceptable salt thereof and a pharmaceutically acceptable excipient.

##STR00001##

Provided herein are compounds of Formula (I), or pharmaceutically acceptable salt thereof, wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.8, R.sub.9, X, Y, Z, W, and m are defined herein. Also provided herein are pharmaceutical compositions comprising a compound of Formula (I) or pharmaceutically acceptable salt thereof and a pharmaceutically acceptable excipient.

##STR00001##

Disclosed herein are compounds of formula (I) which are inhibitors of an IDO enzyme: (I). Also disclosed herein are uses of the compounds in the potential treatment or prevention of an IDO-associated disease or disorder. Also disclosed herein are compositions comprising these compounds. Further disclosed herein are uses of the compositions in the potential treatment or prevention of an IDO-associated disease or disorder.

##STR00001##