1 - ( 5 - TERT - BUTYL - 2 - ARYL - PYRAZOL - 3 - YL ) . 3 - 12 - FLUORO - 4 - [ ( 3 - OXO - 4H - PYRIDO [ 2 . 3 - BJPYRAZIN - 8 - YL ) OXY | PHENYLJUREA DERIVATIVES AS RAF INHIBITORS FOR THE TREATMENT OF CANCER