Abstract: Heterocyclic compounds of the formula:R.sup.1 --Q--Z--X--A--MwhereinR.sup.1 is lower alkyl, a heterocyclic group which may have suitable substituent(s), etc;Q is oxadiazolediyl,Z is bond or vinyl,X is bond,a group of the formula: ##STR1## (in which R.sup.4 is hydrogen or lower alkyl), a group of the formula: ##STR2## (in which R.sup.8 is hydroxy or protected hydroxy), etc; A is bond, lower alkylene or lower alkynylene andM is a heterocyclic group containing at least one nitrogen atom which may have one substituent selected from the group consisting of lower alkyl, an imino protective group and ar(lower)alkyl which may have suitable substituent(s),and a pharmaceutically acceptable salt thereof which are useful as a medicament.

Abstract: The invention relates to a compound useful as an anticonvulsant, and for treatment of delayed neuronal death, the compound being a bicyclic amine of the formula: ##STR1## wherein R.sup.1 is lower alkyl,R.sup.2 is aryl which may have one or more suitable substituent(s), cyclo(lower)alkyl or heterocyclic group,R.sup.3 is hydrogen, lower alkyl which may have one or more suitable substituent(s), lower alkenyl, or acyl which may have one or more suitable substituent(s),R.sup.4 is hydrogen, lower alkyl, or hydroxy(lower)alkyl,R.sup.5 is hydrogen, lower alkyl, halogen, or protected amino, andn is an integer of 1 or 2, with the proviso that when R.sup.3 is lower alkyl which may have one or more suitable substituent(s), R.sup.2 is cyclo(lower)alkyl or heterocyclic group,or a pharmaceutically acceptable salt thereof.

Abstract: The invention relates to cardioprotective compounds of the formula: ##STR1## wherein R.sup.1, R.sup.2 R.sup.3 and R.sup.4 are moieties as described in the specification.

Abstract: The invention relates to a pharmaceutical composition as a therapeutic agent for ischemic disease comprising a compound of the formula ##STR1## wherein R.sup.1 is carbamoyl substituted with morpholino (lower) alkyl, thiomorpholino(lower)alkyl or lower alkylamino(lower)alkyl; or ureido substituted with lower alkylamino(lower)alkyl; andR.sup.2 is phenyl substituted with nitro, andR.sup.4 is lower alkyl; orR.sup.2 is lower alkyl, andR.sup.4 is phenyl substituted with nitro;with proviso that R.sup.1 is carbamoyl substituted with thiomorpholino(lower)alkyl or lower alkylamino(lower)alkyl; or ureido substituted with lower alkylamino(lower)alkyl when R.sup.4 is lower alkyl; or its salt, as an active ingredient, in association with a pharmaceutically acceptable, substantially nontoxic carrier or excipient.

Abstract: The invention relates to diphenylpyridazine compounds useful in the treatment of cerebrovascular disease, of the formula: ##STR1## wherein R.sup.1 is piperazinyl(lower)alkyl, carbamoyl substituted with piperazinyl(lower)alkyl, or piperazinylcarbonyl, in each of which a piperazinyl group may be substituted with lower alkyl,R.sup.2 is phenyl substituted with nitro, andR.sup.3 is hydrogen or halogen, or a pharmaceutically acceptable salt thereof.

Abstract: An N-containing heterocyclic compound of the formula: ##STR1## wherein R.sup.1 is lower alkyl optionally substituted with hydroxy, halogen or a heterocyclic group, carboxy, esterified carboxy, carbamoyl optionally substituted with heterocyclic(lower)alkyl or lower alkylamino(lower)alkyl, N-containing heterocycliccarbonyl optionally substituted with lower alkyl, or ureido optionally substituted with lower alkylamino(lower)alkyl, andR.sup.3 is hydrogen or halogen;R.sup.2 is phenyl substituted with nitro, andX is .dbd.N--or ##STR2## in which R.sup.4 is lower alkyl or halo(lower)alkyl, or is taken together with R.sup.1 to form an N-containing heterocyclic group optionally substituted with oxo and lower alkylamino(lower)alkyl; orR.sup.2 is lower alkyl, andX is ##STR3## in which R.sup.4 is phenyl substituted with nitro; and a pharmaceutically acceptable salt thereof, processes for the preparation thereof and pharmaceutical (e.g. antihypertension) compositions comprising the same.

Abstract: The invention relates to compounds for treatment of hypertension, and cardiovascular and cerebrovascular diseases, which compounds are of the formula: ##STR1## wherein R.sup.1 is piperazinyl(lower)alkyl, carbamoyl substituted with piperazinyl(lower)alkyl, or piperazinylcarbonyl, in each of which a piperazinyl group may be substituted with lower alkyl, andR.sup.3 is hydrogen or halogen;R.sup.2 is phenyl substituted with nitro, andR.sup.4 is lower alkyl or halo(lower)alkyl; orR.sup.2 is lower alkyl, andR.sup.4 is phenyl substitured with nitro;and a pharmaceutically acceptable salt thereof.

Abstract: The invention relates to new pyrimidine derivatives, useful in the treatment of cerebrovascular disease, of the formula: ##STR1## wherein Ar, R.sup.1, R.sup.2 and R.sup.3 are defined in the specification.

Abstract: The invention relates to pyrimidine derivatives and their pharmaceutically acceptable salts which are useful in the treatment of cerebrovascular diseases, to processes for preparation thereof and to the composition containing the same, said pyrimidine derivatives being represented by the following formula: ##STR1## wherein Ar, R.sup.1, R.sup.2 and R.sup.3 are as defined in the disclosure.