The invention provides a crystalline hydrochloride salt of (S)-3-[(S)-1-(4-chlorophenoxy)-2-methylpropyl]pyrrolidine. This invention also provides pharmaceutical compositions comprising the crystalline salt, processes and intermediates for preparing the crystalline salt, and methods of using the crystalline salt to treat diseases.本發明提供一種結晶(S)-3-[(S)-1-(4-氯苯氧基)-2-甲基丙基]吡咯啶鹽酸鹽。本發明亦提供包含該結晶鹽之醫藥組合物、用於製備該結晶鹽之方法及中間物,及使用該結晶鹽治療疾病之方法。(無元件符號說明)