Patent ID: 8394842

Claim:
A compound of formula I: wherein R 1 is cyclopentyl, cyclopropyl, or isopropyl; m is 1 X is —S—; R 2 , R 3 , and R 4 are hydrogen; one of R 5 and R 6 is a group of the formula —Y—(CH 2 ) s —(C═O) r —NR 7 R 8 , and the other is hydrogen; r is 0 or 1; s is 0 or 1; Y is a bond; and R 7 and R 8 independently are hydrogen, C 1-6 -alkyl or C 3-8 -cycloalkyl; or R 7 and R 8 can together with the attached nitrogen form a heterocyclyl group; or a pharmaceutically acceptable salt thereof.