申请人:SHANGHAI DE NOVO PHARMATECH CO., LTD.
                            
                            
                                公开号:US20180022752A1
                            
                            
                                公开(公告)日:2018-01-25
                            
                            This disclosure is related to a fused-ring compound of formula (I) and/or a pharmaceutically acceptable salt thereof, a pharmaceutical composition comprising the fused ring compound of formula (I) and/or a pharmaceutically acceptable salt thereof, preparation methods thereof, and use thereof in modulating activity of indoleamine 2, 3-dioxygenase (IDO) and/or tryptophan 2, 3-dioxygenase (TDO). This disclosure further provides methods of treating IDO and/or TDO-associated diseases, including cancer, viral infection and autoimmune diseases.