Patent ID: 8097636

Claim:
A compound of formula I: or a pharmaceutically acceptable salt thereof, wherein: ring Z is a thiazole or thiadiazole optionally substituted with 0 to 2 occurrences of R; and R, R 1 , R 2 , R 3 , and R 4 are hydrogen, C1-C6 aliphatic, aryl, C3-C8 cycloaliphatic, halo, CN, NO 2 , CF 3 , OCF 3 , OH, NH 2 , NH(C1-C6 aliphatic), N(C1-C6 aliphatic) 2 , COOH, COO(C1-C6 aliphatic), O(C1-C6 aliphatic), CHF 2 , or CH 2 F; wherein R 2 and R 1 are Cl or at least one of R 1 , R 2 , R 3 or R 4 is CF 3 .