Ex Parte SCHMUTZ et al - Page 3

              Appeal No. 2000-1448                                                                          3                
              Application No. 08/709,975                                                                                     

                      component (c) is a compound of formula I                                                               










                      in which                                                                                               
                      R1 and R2 is tert-butyl,                                                                               
                      R3 is hydrogen, and                                                                                    








                                                                                                                            



                      or in which component (c) is                                                                           



                                                                                                                            










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