There are disclosed compounds of the formula ##STR1## where R.sub.1 is loweralkoxycarbonyl, --CH.sub.2 OH or --CONR.sub.3 R.sub.4, R.sub.3 and R.sub.4 being independently hydrogen, loweralkyl or arylloweralkyl; and R.sub.2 is --CH.sub.2 CH.dbd.CH.sub.2, ##STR2## R.sub.5 and R.sub.6 being independently loweralkyl or alternatively the group -NR.sub.5 R.sub.6 as a whole being ##STR3## R.sub.7 being hydrogen, loweralkyl or arylloweralkyl; which are useful for enhancing cholinergic activity in mammals and hence for the treatment of various memory dysfunctions characterized by decreased cholinergic function such as Alzheimer's disease.
公开了一些化合物的结构式为 ##STR1## 其中R.sub.1是低碳酰氧基、--CH.sub.2 OH或--CONR.sub.3 R.sub.4,其中R.sub.3和R.sub.4独立地是氢、低碳基或芳基低碳基;而R.sub.2是--CH.sub.2 CH.dbd.CH.sub.2、##STR2## 其中R.sub.5和R.sub.6独立地是低碳基或者作为整体的-NR.sub.5 R.sub.6,其中R.sub.7是氢、低碳基或芳基低碳基。这些化合物对于增强哺乳动物的
胆碱能活性非常有用,因此可用于治疗各种记忆功能障碍,其特征是
胆碱能功能下降,如阿尔茨海默病。