Disclosed herein are compounds of the formula ##STR1## wherein R.sup.1 R.sup.2, R.sup.7, R.sup.8, X, Y, M and L are defined as below The compounds of formula I are cholinesterase inhibitors and are useful in enhancing memory in patients suffering from dementia and Alzheimer's disease.
本文披露的是公式为##
STR1##的化合物,其中R.sup.1、R.sup.2、R.sup.7、R.sup.8、X、Y、M和L的定义如下。公式I的化合物是
胆碱酯酶抑制剂,对于患有痴呆症和阿尔茨海默病的患者提高记忆力是有用的。