The present invention relates to stable novel salt forms of N-(cyanomethyl)-4-(2-(4-morpholinophenylamino)pyrimidin-4-yl)benzamide that are suitable for the preparation of pharmaceutical formulations thereof, and their therapeutic use.本發明關於N-(氰基甲基)-4-(2-(4-啉基苯基胺基)嘧啶-4-基)苯甲醯胺之穩定的新穎鹽型式,其適用於製備其醫藥調配物,且關於其治療用途。