The invention relates to amidic oxotetrahydro-2H-furo[3.2-b]pyrrol-4(5H)-yl) derivatives as dual CatS/K inhibitors exhibiting a pronounced CatK-inhibition、to pharmaceutical compositions containing these compounds and also to these compounds for use in the treatment and/or prophylaxis of pain and further diseases and/or disorders.本發明是有關於一種做為CatS/K雙重抑制劑之醯胺氧代四氫-2H-呋喃並[3.2-b]吡咯-4(5H)-基)之衍生物,其具有顯著之CatK抑制效果。也有關於一種包括這些化合物之醫藥組合物以及治療和/或預防疼痛以及相關之疾病及/或失調。