[EN] PYRAZINE DERIVATIVES AND PHARMACEUTICAL USE THEREOF AS ADENOSINE ANTAGONISTS<br/>[FR] DÉRIVÉS DE PYRAZINE ET UTILISATION PHARMACEUTIQUE DE CEUX-CI COMME ANTAGONISTES DE L'ADÉNOSINE
                        
                            
                                申请人:ASTELLAS PHAMA INC
                            
                            
                                公开号:WO2005095384A1
                            
                            
                                公开(公告)日:2005-10-13
                            
                            A pyrazine derivative of the following formula (I): wherein is hydrogen or optionally substituted lower alkyl; X,is hydrogen, halogen, hydroxy, cyano, acyl, or amino, aryl, heterocyclic group or the like; Y is hydrogen, halogen, hydroxy, acyl, amino, or the like; Z is aryl. or heteroaryl, each of which is optionallysubstituted; or a salt thereof. The pyrazine compound (I) and a salt thereof of the present invention are adenosine antagonists and are useful for the prevention and/or treatment of depression, dementia (e.g. Alzheimer's disease, cerebrovascular dementia, dementia accompanying Parkinson's disease, etc.), Parkinson's disease,anxiety, pain, cerebrovascular disease (e.g. stroke, etc.), heart failure and the like.