The present application relates to compounds and methods for reducing the severity of convulsant activity or epileptic seizures, or for the treatment of chronic or acute pain.

The present application relates to compounds and methods for reducing the severity of convulsant activity or epileptic seizures, or for the treatment of chronic or acute pain.

A process of forming compounds of formula I ##STR00001##
comprising the steps of addition of an amino compound H.sub.2NR to a compound of formula (II) ##STR00002##
followed by cyclization, isomerization and hydrolysis.

A process of forming compounds of formula I ##STR00001##
comprising the steps of addition of an amino compound H.sub.2NR to a compound of formula (II) ##STR00002##
followed by cyclization, isomerization and hydrolysis.

The present application relates to compounds and methods for reducing the severity of convulsant activity or epileptic seizures, or for the treatment of chronic or acute pain.

The present application relates to compounds and methods for reducing the severity of convulsant activity or epileptic seizures, or for the treatment of chronic or acute pain.

A process of forming compounds of formula I

##STR00001##

comprising the steps of addition of an amino compound H.sub.2NR to a compound of formula (II)

##STR00002##

followed by cyclization, isomerization and hydrolysis.

A process of forming compounds of formula I

##STR00001##

comprising the steps of addition of an amino compound H.sub.2NR to a compound of formula (II)

##STR00002##

followed by cyclization, isomerization and hydrolysis.

A photovoltaic element has high photoelectric conversion efficiency as well as excellent processing properties/low environmental load. The organic semiconductor composition includes as an additive a compound in which one or two aromatic rings are substituted with a predetermined number of alkyl groups, alkoxy groups, alkanoyl groups, or thioalkyl groups. There is also a method of manufacturing a photovoltaic element which uses the composition.

A photovoltaic element has high photoelectric conversion efficiency as well as excellent processing properties/low environmental load. The organic semiconductor composition includes as an additive a compound in which one or two aromatic rings are substituted with a predetermined number of alkyl groups, alkoxy groups, alkanoyl groups, or thioalkyl groups. There is also a method of manufacturing a photovoltaic element which uses the composition.