A series of novel 4-piperidino-6,7-dimethoxyquinazoline compounds, further substituted on the piperidino group, and the pharmaceutically-acceptable salts thereof, possess cardiac stimulating activity in mammals. They are useful in the curative or prophylactic treatment of cardiac conditions, in particular heart failure.
Quinazoline cardiac stimulants of the formula:-
and their pharmaceutically acceptable salts, wherein X is a straight or branched chain alkylene group having a
total of from 1 to 4 carbon atoms; and Y is a group of the formula:-
where R1 is H or C1-C4 alkyl and R2 and R3 are each independently H or CH3; processes for their preparation; and pharmaceutical compositions containing them.
式中的喹唑啉类强心剂:-
及其药学上可接受的盐类,其中 X 是具有 1 至 4 个碳原子的直链或支链亚烷基;Y 是如下式的基团
及其药学上可接受的盐,其中 X 是直链或支链亚烷基,具有 1 至 4 个碳原子; Y 是式中的一个基团
其中 R1 是 H 或 C1-C4 烷基,R2 和 R3 各自独立地是 H 或 CH3;它们的制备工艺;以及含有它们的药物组合物。