THIOPHENE-SUBSTITUTED TETRACYCLIC COMPOUNDS AND METHODS OFUSE THEREOF FOR THE TREATMENT OF VIRAL DISEASES
                        
                            
                                申请人:MERCK SHARP & DOHME CORP.
                            
                            
                                公开号:US20160257697A1
                            
                            
                                公开(公告)日:2016-09-08
                            
                            Thiophene-substituted tetracyclic compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein A, A′, R
2
, R
3
, R
4
and R
5
are as defined herein. The compositions comprising at least one thiophene-substituted tetracyclic compound, and methods of using the thiophene-substituted tetracyclic compounds for treating or preventing HCV infection in a patient are also provided.