abstract |
A compound of formula (I) or a pharmaceutically acceptable salt thereof, wherein Z is selected from the group consisting of phenyl; naphthyl; C3-7 cycloalkyl; heterocycle; and heterobicyclo; wherein Z is optionally substituted with one, or independently of each other, more halogen; CN; OH; = O, where the ring is at least partially saturated; C1-6 alkyl, optionally substituted with one or more F; and O-C1-6 alkyl, optionally substituted with one or more F; R1, R2, R4, R5 are independently from each other selected from the group consisting of H. |