The present invention provides compounds, or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition containing said compounds, or a pharmaceutically acceptable salt thereof, useful as a Notch pathway signaling inhibitor for the treatment of named cancers, sensorineural hearing loss caused by auditory hair cell loss, and inducing auditory hair cell generation.本發明提供可用作刻痕路徑傳訊抑制劑之化合物或其醫藥上可接受的鹽、及含該等化合物或其醫藥上可接受的鹽之醫藥組合物,用於治療指定癌症、由聽覺毛細胞損失引起之感覺神經性(sensorineural)聽力損失,及誘導聽覺毛細胞生成。