申请人:MERCK PATENT GMBH
                            
                            
                                公开号:WO2012025187A2
                            
                            
                                公开(公告)日:2012-03-01
                            
                            Compounds of the formula (I) in which R1 denotes Ar1 or Het1, R2 denotes Ar2, Het2, NH(CH2)nAr2, O(CH2)nAr2 or NH(CH2)nHet2, are inhibitors of Syk, and can be employed, inter alia, for the treatment of rheumatoid arthritis and/or systemic lupus.