abstract |
A compound of formula (I) ** (See formula) ** wherein R1 is ** (See formula) ** X is selected from O, S or CF2; R6 is selected from C1-3 alkyl, wherein said C1-3 alkyl is optionally substituted with 1, 2 or 3 F; R7 is selected from hydrogen, F, Cl, or CH3; or a pharmaceutically acceptable salt thereof. |