申请人:Hoffmann-La Roche Inc.
                            
                            
                                公开号:US20210253575A1
                            
                            
                                公开(公告)日:2021-08-19
                            
                            The present invention relates to compounds of formula (I), wherein R
1
, R
2
, R
3
and R
4
are as described herein, and their pharmaceutically acceptable salt, enantiomer or diastereomer thereof, and compositions including the compounds and methods of using the compounds.