The present disclosure provides,inter alia, Compounds of Formula (I)or pharmaceutically acceptable salts thereof that are modulators of the C5a receptor. Also provided are pharmaceutical compositions and methods of use including the treatment of diseases or disorders involving pathologic activation from C5a and non-pharmaceutical applications.本發明尤其提供式(I)化合物或其醫藥學上可接受之鹽,其為C5a受體之調節劑。亦提供醫藥組合物及使用方法,其包括涉及C5a之病理性活化之疾病或病症的治療及非醫藥學應用。