Abstract: The invention provides 4-substituted aryl-5-hydroxyisoquinolinone derivatives and their pharmacologically acceptable addition salts with excellent inhibitory effect on poly (ADP-ribose) synthetase. 4-Substituted aryl-5-hydroxyisoquinolinone derivatives, represented by a general formula (1) and their pharmacologically acceptable addition salts.

Abstract: The invention provides 4-substituted aryl-5-hydroxyisoquinolinone derivatives and their pharmacologically acceptable addition salts with excellent inhibitory effect on poly (ADP-ribose) synthetase. 4-Substituted aryl-5-hydroxyisoquinolinone derivatives, represented by a general formula (1) and their pharmacologically acceptable addition salts.

Abstract: The invention provides compounds with antagonism against excitatory amino acid receptors, in particular, AMPA receptor having 6-substituted-7-heteroquinoxalinecarboxylic acid derivatives and addition salts thereof as effective ingredients, and processes for the preparation of both. The compounds are 6-substituted-7-heteroquinoxalinecarboxylic acid derivatives represented by the formula (1) where A denotes a single bond or methylene (CH2), Y denotes a nitrogen atom or ═CH—, V denotes a single bond or methylene (CH2), T denotes a hydroxyl group, amino group, lower alkoxycarbonyl group, carboxyl group, aldehyde group or the like, Q denotes a halogen atom, lower alkyl group or lower alkoxy group, and R1 denotes a hydroxyl group, lower alkoxy group or the like, and addition salts thereof.

Abstract: The invention provides compounds with antagonism against excitatory amino acid receptors, in particular, AMPA receptor having 6-substituted heteroquinolinecarboxylic acid derivatives and addition salts thereof as effective ingredients, and processes for the preparation of both. These compounds relate to 6-substituted heteroquinolinecarboxylic acid derivatives represented by a general formula (1) (wherein A denotes a single bond or methylene (CH2), Y denotes a nitrogen atom or ═CH—, V denotes a single bond or methylene (CH2), T denotes a hydroxyl group, amino group, lower alkoxycarbonyl group, carboxyl group, aldehyde group or the like, R denotes a nitro group, trifluoromethyl group or halogen atom, and R1 denotes a hydroxyl group or lower alkoxy group), and addition salts thereof.

Abstract: The present invention provides 6,7-asymmetrically disubstituted quinoxalinecarboxylic acid compounds and their addition salts, and processes for preparing them, which have antagonism against excitatory amino acid receptors, in particular, an AMPA receptor. The 6,7-asymmetrically disubstituted quinoxalinecarboxylic acid compounds and their addition salts of the present invention are represented by formula (1) wherein Q, R, R1 and R2 are as described in the specification.

Abstract: An optically active imidazolidinone derivative represented by general formula (1), having a cholinergic activity (a muscarine M.sub.1 activity) and being useful for treating senile dementia, a pharmacologically acceptable acid-addition salt thereof, and a process for producing the same, wherein R and R.sup.1 may be the same or different and each represents hydrogen, halogen, optionally halogenated lower alkyl, lower alkoxy, lower alkylthio, lower alkoxycarbonyl, nitro, amino or cyano; and n represents 1 to 4.