Abstract: The present invention provides a nitrogenous heterocyclic compound represented by the following general formula (1) or a pharmacologically acceptable salt thereof which is useful for various ischemic heart diseases and the like: ##STR1## ?in formula (1), ring A represents a benzene ring, a pyridine ring or a cyclohexane ring; ring B represents a pyridine ring, a pyrimidine ring or an imidazole ring, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent each a hydrogen atom, a halogen atom or a group such as a lower alkoxy group; R.sup.5 represents a group represented by the formula --NR.sup.11 R.sup.12 (wherein R.sup.11 and R.sup.12 represent each a hydrogen atom or a group such as a lower alkyl group) or the like; and R.sup.6 represents a group represented by the formula ##STR2## (wherein R.sup.19 represents a hydrogen atom, a lower alkyl group or the like; R.sup.20, R.sup.21 and R.sup.22 represent each a hydrogen atom, a halogen atom, a hydroxyl group or the like; and r represents 0 or an integer of 1 to 8)!.

Abstract: The present invention provides a nitrogenous heterocyclic compound represented by the following general formula (1) or a pharmacologically acceptable salt thereof which is useful for various ischemic heart diseases and the like: ##STR1## ?in formula (1), ring A represents a benzene ring, a pyridine ring or a cyclohexane ring: ring B represents a pyridine ring, a pyrimidine ring or an imidazole ring, R.sup.1, R.sup.2, R.sup.3 R.sup.4, R.sup.5 and R.sup.6 are described herein.

Abstract: The invention is directed to certain 2,4-diaminoquinazoline compounds, their pharmaceutically acceptable salts, the pharmaceutical compositions comprising those compounds and their therapeutic methods of use. The compounds possess anti-ischemic activity.

Abstract: A quinone derivative useful in the treatment of hepatic diseases defined by the general formula: ##STR1## where X and Y may be the same or different from each other and are each a hydroxyl group, a group represented by the formula --(--OCH.sub.2 --).sub.n --OR.sup.6, wherein n is 0 or 1 and R.sup.6 is a lower alkyl group, or an acyl group.

Abstract: A quinone derivative useful in the treatment of hepatic diseases defined by the general formula: ##STR1## where R1 is selected from the group consisting of alkyl, alkenly, alkynyl or heterocycle, R2 is a substituted nitrogen containing radical wherein the substituents on said nitrogen are selected from the group consisting of hydrogen, substituted or unsubstituted lower alkyl or heterocycles, and where said nitrogen may be a ring heteroatom, and R3, R4 and R5, may be the same or different and each are hydrogen, lower alkyl or lower alkoxy groups.