PROBLEM TO BE SOLVED: To provide compounds that are modulators of the C5a receptor, and pharmaceutical compositions, comprising at least one of the compounds.SOLUTION: Compounds are provided that are modulators of the C5a receptor, where the compounds are substituted piperidines. There are also provided pharmaceutical compositions, comprising at least one of the compounds, for the treatment of diseases and disorders associated with the activation of C5a receptors.SELECTED DRAWING: Figure 1X【課題】C5a受容体のモジュレータである化合物、及びこれらの化合物を1つ以上含む医薬組成物の提供。【解決手段】置換されたピペリジンであってC5a受容体のモジュレータである化合物、及びこれらの化合物を1つ以上含む、C5a受容体の活性化が関与する疾患及び障害を治療するための医薬組成物。【選択図】図1X