Patent ID: 7994156

Claim:
A compound of Formula I: any of its stereoisomers or any mixture of its stereoisomers, or a pharmaceutically acceptable salt thereof, wherein Q represents a phenyl group; which phenyl group is optionally substituted with one or more substituents independently selected from the group consisting of: halo, trifluoromethyl, trifluoromethoxy, cyano and alkoxy; n is 0 or 1; R 1 represents hydrogen or alkyl; and either R 2 and R 3 together form —CH 2 —CH 2 —, —CH 2 —CH 2 —CH 2 — or —CH 2 —CH 2 —CH 2 —CH 2 —; and R 4 represents hydrogen; or R 1 and R 4 together form —CH 2 —CH 2 —; and R 3 represents hydrogen; or R 2 , R 3 and R 4 each represent hydrogen.