Ex Parte Zhang et al - Page 7



           Appeal No. 2003-0061                                                                     
           Application No. 09/611,109                                                               

                  L, a linking group, is:                                                           
                  C  saturated or unsaturated branched or unbranched carbon1-10                                                                            
           chain;                                                                                   
                  wherein one or more methylene groups are optionally                               
           independently replaced by O,N or S; and                                                  
                  wherein said linking group is optionally substituted with                         
           0-2 oxo groups and one or more C  branched or unbranched alkyl1-4                                                
           optionally substituted by one or more halogen atoms; or L is a                           
           cyclic group which is:                                                                   
           a) a C  cycloalkyl or cycloalkenyl optionally substituted with5-8                                                                               
           1-2 oxo groups, 1-3 C  branched or unbranched alkyl, C  alkoxy1-4                                 1-4                        
           or C  alkylamino chains;1-4                                                                                 
           b) phenyl, furan, thiophene, pyrrole, imidazolyl, pyridine,                              
           pyrimidine, pyridinone, dihydropyridinone, maleimide,                                    
           dihydromaleimide, piperdine, piperazine or pyrazine each being                           
           optionally independently substituted with 1-3 C  branched or1-4                              
           unbranched alkyl, C  alkoxy, hydroxy, cyano, mono- or di-1-4                                                               
           (C alkyl)amino, C  alkyl-S(O) , or halogen;1-3                1-6            q                                                   










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