There are disclosed a 9-acylamino-tetrahydroacridine derivative represented by the following formula (I): ##STR1## wherein R ##STR2## are as defined in the specification, its optical antipode or pharmaceutically acceptable acid addition salt thereof and a memory enhancing agent containing the same as an active ingredient.
本发明公开了一种由以下式(I)表示的9-酰
氨基
四氢咔啉衍
生物:##STR1## 其中R ##STR2## 如规范中所定义,其光学对映体或药学上可接受的酸加盐,以及含有其作为活性成分的增强记忆剂。