Patent ID: 7285548

Claim:
A compound of formula I wherein R 1 is selected from the group consisting of cyclopentyl, cyolopentyl substituted by CF 3 , cyclopentyl substituted by lower alkyl, cyclopentyl substituted by —(CH 2 ) n OH, cyclopentyl substituted by —(CH 2 ) n —O-lower alkyl, cyclohexyl, cyclohexyl substituted by CF 3 , cyclohexyl substituted by lower alkyl, cyclohexyl substituted by —(CH 2 ) n OH, cyclohexyl substituted by —(CH 2 ) n —O-lower alkyl, 1-bicyclo[2.2.1]hept-2-yl, 1-(7-oxa-bicyclo[2.2.1]hept-2-yl, 1-(5-exo-hydroxy-bicyclo[2.2.1]hept-2-exo-yl, 1-(5-exo-hydroxy-bicyclo[2.2.1]hept-2-endo-yl, and 1-adamantan-1-yl; and R 2 is lower alkyl; and n is 0 or 1; or a pharmaceutically acceptable salt thereof.