| abstract |
Compounds and pharmaceutically acceptable salts of the compounds are disclosed, wherein the compounds have the structure of Formula (I) wherein A1 , A2, A3, A4, A5, A6, A7, A8, X4, X6, R2k, R2I, R4, R5, and R6 are as defined in the detailed description of the invention. Corresponding pharmaceutical compositions, methods of treatment, methods of synthesis, and intermediates are also disclosed. |