主权项 |
1. A compound encompassed by the following formula:or a pharmaceutically acceptable salt thereof, wherein:
R1 is selected from the group consisting of Cl, Br, I, C1-4 alkyl and OMe; R2 is selected from the group consisting of Cl, Br, I, C1-4 alkyl and OMe; and n is an integer selected from the group consisting of 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11. |