Patent ID: 7968570

Claim:
A compound according to formula I: wherein: R 1 is a phenyl ring substituted by one or more A; R 2 and R 3 are H; R 4 and R 6 are H; R 5 is a 5- to 7-membered ring that may contain one or more heteroatoms independently selected from the group consisting of N, O and S, wherein R 5 may be substituted by one or more A; R 7 is selected from the group consisting of H, F, Cl, Br, I and C 1-6 -alkyl; R 8 and R 9 are independently H or C 1-6 -alkyl; n is selected from the group consisting of 1, 2, 3, 4, 5, 6, 7 and 8; and A is C 1-6 -alkylheterocyclyl or OC 1-6 -alkylhalo; or a pharmaceutically acceptable salt or optical isomer thereof.