[EN] 5,6,7,8-TETRAHYDRO-IMIDAZO[1,5-A]PYRAZINE COMPOUNDS<br/>[FR] COMPOSÉS DE 5,6,7,8-TÉTRAHYDRO-IMIDAZO[1,5-A]PYRAZINE
                        
                            
                                申请人:ACTELION PHARMACEUTICALS LTD
                            
                            
                                公开号:WO2009156951A2
                            
                            
                                公开(公告)日:2009-12-30
                            
                            The invention relates to 5,6,7,8-tetrahydro-imidazo[1,5- a]pyrazine derivatives of formula (I) wherein R1, R2, R3, and R4 are as described n the description, to salts, especially pharmaceutically acceptable salts thereof, and to the use of such compounds as medicaments; especially as orexin receptor antagonists.