Patent ID: 8093424

Claim:
A compound of formula II, or a pharmaceutically acceptable salt thereof, wherein: m is from 0 to 3; Ar is optionally substituted aryl or optionally substituted heteroaryl; each R 1 is independently halo, alkyl, haloalkyl, alkoxy, hydroxy, heteroalkyl, cyano, —S(O) t —R a , —C(═O)—NR b R c , —SO 2 —NR b R c , —N(R d )—C(═O)—R e , or —C(═O)—R e , where t is from 0 to 2, R a , R b , R c , R d and R e each independently is hydrogen or alkyl; R 2 is n is from 1 to 3; R 3 and R 4 are hydrogen, R 5 is hydrogen or methyl, and R 6 is: wherein R g , R h , R i and R j each independently is hydrogen or methyl.