Provided are compounds of formula I and formula II or pharmaceutically acceptable salts of the compounds and pharmaceutical compositions thereof. The compounds of formula I and formula II or the pharmaceutically acceptable salts of the compounds provide indole 2,3-dioxygenase (IDO) inhibitory activity and are capable of treating IDO-mediated immunosuppressive diseases, such as infectious diseases or cancer.
本文提供了式 I 和式 II 的化合物或其药学上可接受的盐及其药物组合物。式 I 和式 II 的化合物或其药学上可接受的盐具有
吲哚-2,3-二氧合酶(
IDO)抑制活性,能够治疗
IDO 介导的免疫抑制疾病,如传染性疾病或癌症。