Abstract: Aniline derivatives of the formula: ##STR1## wherein R.sup.0, R.sup.1 and R.sup.2 are the same or different and each is a hydrogen atom, a halogen atom, a nitro group, an amino group, a carboxy group, a cyano group, a hydroxy group, a sulfonamido group, a lower alkyl group, a lower alkoxycarbonyl group, a lower alkoxy group, a lower alkanoyl group, a lower alkylamino group, a lower alkylthio group, a lower alkanoylamino group or a group of the formula ##STR2## wherein R.sup.5 and R.sup.6 are the same or different and each is a hydrogen atom, a lower alkyl group or a C.sub.3 to C.sub.8 cycloalkyl group or together with the nitrogen atom a morpholino, piperidino, piperazino or pyrrolidino group; R.sup.3 is a cyano group, a nitro group, a halogen atom, a lower alkyl group or a lower alkoxy group; m is an integer of 1 to 3; R.sup.4 is a hydrogen atom or a lower alkyl group; and A is a lower alkylene group. The derivatives are useful as cardiotonics.

Abstract: Novel carbostyril derivatives represented by the general formula (1), ##STR1## wherein R.sup.1 is a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group or a phenyl-lower alkyl group; R.sup.2 is a lower alkanoyl group, a lower alkoxycarbonyl group, a furoyl group, a lower alkane-sulfonyl group, a substituted benzoyl group, a substituted phenyl-lower alkenylcarbonyl group, a phenoxy-lower alkyl group, or a substituted phenylsulfonyl group; A is a lower alkylene group; the carbon-carbon bond between 3- and 4-positions in the carbostyril skeleton is a single or double bond; and the substituted position of the side-chain of the formula, ##STR2## may be of 5-, 6-, 7- or 8-position in the carbostyril skeleton; and acid addition salts thereof.

Abstract: Carbostyril derivatives of the general formula ##STR1## wherein R.sup.1 is a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group or a phenyl-lower alkyl group and R.sup.2 and R.sup.3 may be the same or different and each is a substituted or unsubstituted lower alkyl group, or R.sup.2 and R.sup.3 may form, together with the adjacent nitrogen atom, a 5- or 6-membered saturated heterocyclic ring which may be substituted or unsubstituted. The derivatives are useful as the active ingredient in cardiotonic compositions.

Abstract: Novel carbostyril derivatives and their pharmaceutically acceptable salts represented by the formula (I) ##STR1## wherein R.sup.1 is a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group or a phenyl-lower alkyl group; R.sup.2 and R.sup.3 may be the same or different and each is a lower alkyl group which may have one hydroxy group or one halogen atom as the substituent, or a phenyl-lower alkyl group which may have 1 to 3 substituents selected from the group consisting of a lower alkoxy group and a halogen atom on the phenyl ring, or said phenyl-lower allkyl group may have a lower alkylenedioxy group as the substituent on the phenyl ring; further R.sup.2 and R.sup.

Abstract: Novel carbostyril derivatives and their pharmaceutically acceptable salts represented by the formula (1). ##STR1## wherein R.sup.1 is a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group or a phenyl-lower alkyl group, R.sup.2 and R.sup.3 form, together with the adjacent nitrogen atom and further with an additional oxygen atom, a 5- or 6-membered saturated heterocyclic ring which may have a lower alkyl group or a phenyl-lower alkyl group as the substituent; the carbon-carbon bond between 3- and 4-positions in the carbostyril skeleton being a single or double bond. The derivatives are useful as the active ingredient in cardiotonic compositions.

Abstract: A piperazinylcarbostyril compound of the formula (I) ##STR1## wherein R.sup.1 represents a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group, or a phenyl-lower alkyl group;R.sup.2 represents a hydrogen atom or a lower alkoxy group;R.sup.

Abstract: A carbostyril compound of the formula (I) ##STR1## wherein the values of the substituents are as defined in the description, and pharmaceutically acceptable salts thereof, composition containing the compound of the formula (I) or its pharmaceutically acceptable salt as an active ingredient, and process for preparing same. The compound of the formula (I) and its pharmaceutically acceptable salts have cardiotonic effects.

Abstract: Novel compounds represented by the formula ##STR1## wherein R.sup.1, R.sup.2, R' and R" are defined as hereinafter, having a blocking activity on .beta.-adrenergic nerves, novel intermediates useful for synthesis thereof and processes for preparing the same are disclosed. When substitution is at the 5-position and R.sup.1 and R.sup.2 are hydrogen, R' and R" are not simultaneously hydrogen and a 1 to 4 carbon atom alkyl group in the claimed compound.

Abstract: Carbostyril compounds represented by the formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom or an alkyl group; R.sub.2 represents a hydrogen atom, an alkyl group or a phenylalkyl group; R.sub.3 represents a hydrogen atom and R.sub.4 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.

Abstract: Carbostyril compounds represented by the formula (I) ##STR1## wherein R.sub.1 represents a hydrogen atom, an alkyl group or a phenylalkyl group, R.sub.2 represents an alkenyl group, an alkoxyalkyl group, a hydroxyalkyl group, a carboxyalkyl group, an alkylcarbonyl group, a cycloalkylcarbonyl group, an alkylcarbonylalkyl group, an alkoxycarbonylalkyl group, an alkynyl group or a carbamoylalkyl group, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxyalkyl group, an alkenyl group, a phenylalkyl group, a phenoxyalkyl group or a phenyl group, and the 3,4-bond of the carbostyril nucleus represents a single or double bond, pharmaceutically acceptable salts thereof, and a process for preparing the same.

Abstract: Novel compounds represented by the formula ##STR1## wherein R.sup.1, R.sup.2, and R' and R" are defined as hereinafter, having a blocking activity on .beta.-adrenergic nerves, novel intermediates useful for synthesis thereof and processes for preparing the same are disclosed. When substitution is at the 5-position and R.sup.1 and R.sup.2 are hydrogen, R' and R" are not simultaneously hydrogen and a 1 to 4 carbon atom alkyl group in the claimed compound.

Abstract: Carbostyril compounds represented by the formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom, R.sub.2 represents a hydrogen atom, a phenylalkyl group, an alkoxyalkyl group, a hydroxyalkyl group, an alkylcarbonyl group, an alkynyl group, R.sub.3 and R.sub.4 each represents a hydrogen atom, a heterocyclic alkyl group or R.sub.3 and R.sub.4 can form, when taken together with the nitrogen atom to which they are attached, a 5- or 6-membered heterocyclic ring which may contain a nitrogen atom or an oxygen atom as an additional hetero atom, 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.