This invention relates to compounds of the formula ##STR1## wherein R.sub.1 is hydrogen or loweralkyl; R.sub.2 is hydrogen or loweralkyl; and R.sub.3 is hydrogen, loweralkyl, halogen, nitro, amino, hydroxy, loweralkoxy, benzyloxy or ##STR2## where R.sub.4 is hydrogen or loweralkyl and R.sub.5 is loweralkyl, aryl or arylloweralkyl, or R.sub.4 and R.sub.5 taken together form a heterocyclic ring selected from the group consisting of ##STR3## wherein R.sub.6 is hydrogen, loweralkyl, aryl or arylloweralkyl or a pharmaceutically acceptable acid addition salt thereof. The compounds of this invention are useful for alleviating depression and various memory dysfunctions characterized by a cholinergic or adrenergic deficit, such as Alzheimer's Disease.
本发明涉及以下式子的化合物:##STR1## 其中R.sub.1是氢或低碳基;R.sub.2是氢或低碳基;R.sub.3是氢,低碳基,卤素,硝基,
氨基,羟基,低碳氧基,苄氧基或##STR2## 其中R.sub.4是氢或低碳基,R.sub.5是低碳基,芳基或芳基低碳基,或R.sub.4和R.sub.5共同形成从以下组中选择的杂环环:##STR3## 其中R.sub.6是氢,低碳基,芳基或芳基低碳基或其药学上可接受的酸盐。本发明的化合物可用于缓解抑郁症和各种记忆功能障碍,其特征是
胆碱能或
肾上腺素能缺陷,例如阿尔茨海默病。