Disclosed herein is a compound of formula (I), or a pharmaceutically acceptable salt thereof:.Also disclosed herein are uses of a compound disclosed herein in the potential treatment or prevention of an IDO-associated disease or disorder. Also disclosed herein are compositions comprising a compound disclosed herein. Further disclosed herein are uses of a composition in the potential treatment or prevention of an IDO-associated disease or disorder.本文揭示一種式(I)化合物或其醫藥學上可接受之鹽：。本文亦揭示本文所揭示之化合物的用途，其用於IDO相關疾病或病症之潛在治療或預防。本文亦揭示一種包含本文所揭示之化合物的組合物。本文進一步揭示組合物之用途，其用於IDO相關疾病或病症之潛在治療或預防。
