TREATMENT OF PAIN

摘要

This invention provides a method of treating pain in a mammal that includes administering to a mammal in need of such treatment a pain treating effective amount of a compound of the formula I: or a pharmaceutically acceptable salt thereof, wherein each of R<SUB>1</SUB>, R<SUB>2</SUB>, R<SUB>3</SUB>, n, y, and Ar is as defined and described herein. The present invention also provides pharmaceutical compositions for treating pain containing a pain treating effective amount of the compound of formula I.