Patent ID: 7799797

Claim:
A compound of formula I: or a pharmaceutically acceptable salt thereof, wherein: m is from 0 to 3; q is from 0 to 3; Ar is optionally substituted aryl or optionally substituted heteroaryl; R 1 and R 7 each independently is halo, alkyl, haloalkyl, alkoxy, hydroxy, heteroalkyl, cyano, —S(O) r —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 f , where t is from 0 to 2, R a , R b , R c , R d and R e each independently is hydrogen or alkyl, and R f is hydrogen, alkyl, alkoxy or hydroxy; R 2 is n is from 1 to 3; R 3 and R 4 each independently is hydrogen or alkyl, or R 3 and R 4 together may form ═O or ═NR z wherein R z is hydrogen or alkyl; and one of R 5 and R 6 is hydrogen or alkyl and the other is: hydrogen; alkyl; amidinyl; aminocarbonyl; alkylcarbonyl; alkoxycarbonyl; aminocarbonylalkyl; aminoalkylcarbonyl; alkoxycarbonylalkyl; imidazolonyl; imidazolylcarbonyl; pyrrolylcarbonyl; pyrrolidinylcarbonyl; N-cyanoamidinyl; alkylsulfonyl; hydroxyalkylcarbonyl; aminosulfonyl; hydroxyalkyl; alkoxalkyl; alkylsulfonylalkyl; or optionally substituted heteroaryl; or R 5 and R 6 together with the nitrogen to which they are attached may form an amidinyl group, a urea group, a guanidinyl group or a five- or six-membered heteroaryl or heterocyclyl ring that is optionally substituted and which optionally includes an additional heteroatom selected from O, N and S; or one of R 5 and R 6 and one of R 3 and R 4 together with the atoms to which they are attached may form a five- or six-membered ring that optionally includes an additional heteroatom selected from O, N and S.