The invention relates to AKR1C3 inhibitors of formula (I) and to processes for preparation thereof, to the use thereof for treatment and/or prophylaxis of diseases and to the use thereof for production of medicaments for treatment and/or prophylaxis of diseases, especially of bleeding disorders and endometriosis.本發明係關於式(I)之AKR1C3抑制劑及其製備方法,其用於治療及/或預防疾病之用途,及其用於產生用以治療及/或預防疾病、尤其出血性病症及子宮內膜異位症之藥物的用途。