Ex Parte Esser et al - Page 30


                Appeal 2006-3252                                                                                 
                Application 09/536,728                                                                           

                                           R4         R5            H                                            
                                                                    N                                            
                                     R3                     N                                                    
                                                                     N                                           
           1                               R2         R1             H                                           
           2                                                                                                     
           3                                       Formula 1                                                     
           4                                                                                                     
           5    where:                                                                                           
           6           R1 can be methyl, ethyl or halo [halogen];                                                
           7           R2 can be ―NR6R7, where                                                                   
           8                 R6 can be methyl and                                                                
           9                 R7 can be hydrogen, methyl and ethyl;                                               
          10           R3 can be hydrogen;                                                                       
          11           R4 can be hydrogen; and                                                                   
          12           R5 can be hydrogen, fluoro, bromo and iodo.                                               
          13                                                                                                     
          14           York describes a different genus of compound, but falling within the                      
          15    genus of the York compounds is a subgenus of compounds similar to the                            
          16    subgenus of Esser.                                                                               








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