Patent ID: 7939535

Claim:
A compound of formula (I): wherein: X is independently fluorine or chlorine; n is 1 or 2; Z is —NH— or —O—; R is C 1-6 -alkyl, wherein C 1-6 -alkyl is optionally substituted by —CONH 2 , 3 to 6 membered monocyclic cycloalkyl or 4 to 6 membered monocyclic heterocycloalkyl; C 1-6 -hydroxyallyl; C 1-6 -alkoxy; 3 to 6 membered monocyclic cycloalkyl; or 4 to 6 membered monocyclic heterocycloalkyl; wherein 3 to 6 membered monocyclic cycloalkyl and 4 to 6 membered monocyclic heterocycloalkyl are optionally substituted by one or more substituents selected from the group consisting of halo, hydroxy, C 1-6 -alkyl, C 1-6 -haloalkyl, C 1-6 -hydroxyalkyl and C 1-6 -alkoxy; or a pharmaceutically acceptable salt thereof.