Patent ID: 7754721

Claim:
A compound of formula I: or a pharmaceutically acceptable salt thereof, wherein: m is from 1 to 3; n is from 0 to 2; Ar is: indolyl; indazolyl; azaindolyl; azaindazolyl; 2,3-dihydro-indolyl; benzothiophenyl; quinolinyl; or isoquinolinyl; wherein Ar is may be substituted with chloro, fluoro, cyano, methyl, methoxy or —C(O)—NH 2 ; one of X, Y and Z is N and the others are CR a , or X, Y and Z are CR a wherein each R a is independently hydrogen or R 7 ; R 1 is: hydrogen; or C 1-6 alkyl; R 2 , R 3 and R 4 each independently is hydrogen or C 1-6 alkyl; R 5 and R 6 each independently is hydrogen or C 1-6 alkyl; and each R 7 is independently: C 1-6 alkyl; C 1-6 alkyloxy; hydroxy; amino; C 1-6 alkylamino; N,N-di-(C 1-6 alkyl)-amino; halo; halo-C 1-6 alkyl; halo-C 1-6 alkoxy; C 1-6 alkylsulfonyl; C 1-6 alkylsulfanyl; cyano; or —(CH 2 ) p -A-C(O)—B—(CH 2 ) q —R b wherein: p and q each independently is 0 or 1; A and B each independently is —O—, —NH— or a bond; and R b is; C 1-6 alkyl; C 1-6 alkyloxy; hydroxy; amino; C 1-6 alkylamino; N,N-di-(C 1-6 alkyl)-amino; halo-C 1-6 alkyl; or halo-C 1-6 alkoxy.