| abstract |
Carbostyril compounds represented by the formula (I): <IMAGE> (I) wherein R1 represents a hydrogen atom or an alkyl group; R2 represents a hydrogen atom, an alkyl group or a phenylalkyl group; R3 represents a hydrogen atom and R4 represents a phenylalkyl group or a phenoxyalkyl group; the 3,4-bond of the carbostyril nucleus represents a single or double bond, pharmaceutically acceptable acid addition salts thereof, and process for preparing the same. |