abstract |
A compound of formula I: n n n n n n n n n n stereoisomers or a pharmaceutically acceptable salt thereof, wherein X, X 1 , X 2 , X 3 , R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are described herein, compositions including the compounds and methods of making and using the compounds for the treatment of diseases. |