Methods of using piperidyl-benzisoxazole and benisothiazole derivatives as cholinesterase inhibitors
 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. 
Pfizer Inc.
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Arthur A. Yuhpyng L. Anabella
Nagel Chen Villalobos