| abstract |
Desclosed is carbostyril derivatives of the general formulan n wherein R¹ is a halogen, a hydroxyl, lower alkoxy, lower alkyl, lower alkenyloxy, amino, lower-alkanoyl amino or lower alkylthio group, R² is a phenyl group which may optioanlly have one or two substituents, A is a lower alkylene group, and n is an integer of 1 or 2 and wherein the carbon-carbon bond between the positions 3 and 4 of the carbostyril skeleton may be a single bond or a double bond, and salts thereof, and pharmaceutical compositions containing the same for use as a disturbance-of-consciousness improving agent, central nervous system stimulant or sigma receptor agonist. |