There are described compounds of the formula,
where
X is hydrogen, loweralkyl, loweralkoxy or halogen;
R when present is hydrogen, loweralkyl or arylloweralkyl;
R₁ is hydrogen, loweralkyl or arylloweralkyl; and
R₂ when present is hydrogen or loweralkyl;
which compounds are useful for alleviating various memory dysfunctions characterized by a decreased cholinergic function such Alzheimer's disease.
所述化合物的
化学式如下
其中
X 是氢、低级烷基、低级烷氧基或卤素;
存在时,R 是氢、低级烷基或芳基低级烷基;
R₁ 是氢、低级烷基或芳基低级烷基;以及
R₂ 存在时为氢或低级烷基;
这些化合物可用于缓解以
胆碱能功能下降为特征的各种记忆功能障碍,如阿尔茨海默病。