The specification relates to compounds of Formula (I)and pharmaceutically acceptable salts thereof. The specification also relates to processes and intermediates used for their preparation, pharmaceutical compositions containing them and their use in the treatment of cell proliferative disorders.本說明書涉及具有式 (I) 之化合物及其藥學上可接受的鹽。本說明書還涉及用於製備它們的方法及中間體,包含它們的藥物組成物,以及它們在治療細胞增殖性障礙中之用途。