申请人:Clark Roger B.
                            
                            
                                公开号:US20120108569A1
                            
                            
                                公开(公告)日:2012-05-03
                            
                            The present invention is directed to a compound represented by Structural Formula (I) or a pharmaceutically acceptable salt thereof. The variables for Structural Formula I are defined herein. Also described is a pharmaceutical composition comprising the compound of Structural Formula I and its therapeutic use.