Abstract: Disclosed herein are compounds of formula I: or a pharmaceutically acceptable salt thereof, where the variables are as defined herein. These compounds are useful in treating RET associated cancers. Formulations containing the compounds of formula I and methods of making the compounds of formula I are also disclosed.

Abstract: A movable robot for performing tasks upon and traversing a work surface. The robot having a first support means having a longitudinal axis. The first support means have first gripping means extending therefrom for detachable adhering the first support means to the work surface. The robot further having at least one second support means movably coupled to the first support means. Respective second gripping means extend from each second support means for detachable adhering the second support means to the work surface. The first and second gripping means are capable of being moved relative to one another both in a direction parallel to the longitudinal axis and along a line that intersects the longitudinal axis. At least one tool is attached to one or more of the first and second support means.