The present disclosure relates to certain (2S)-N-[(1S)-1-cyano-2-phenylethyl]-1,4-oxazepane-2-carboxamide compounds (including pharmaceutically acceptable salts thereof), that inhibit dipeptidyl peptidase 1 (DPP1) activity, to their utility in treating and/or preventing clinical conditions including respiratory diseases, such as asthma and chronic obstructive pulmonary disease (COPD) , to their use in therapy, to pharmaceutical compositions containing them and to processes for preparing such compounds.本揭示係有關於抑制二肽基肽酶1(DPP1)活性之某些(2S)-N-[(1S)-1-氰基-2-苯基乙基]-1,4-氧氮雜環庚烷-2-甲醯胺化合物(包括其之藥學上可接受的鹽類),,有關於其等於治療及/或預防臨床病況之用途,包括呼吸性疾病例如氣喘及慢性阻塞性肺臟疾病(COPD),有關於其等於療法之用途,有關於包含其等之藥學組成物,以及製備此等化合物的方法。