Ex parte KYLE et al. - Page 12




             Appeal No. 1997-0100                                                                                     
             Application 08/167,051                                                                                   


             wherein R is selected from the group consisting of methyl, ethyl, propyl, isobutyl,                      
             cyclohexylmethyl, allyl, methallyl, prenyl, benzyl, phenyl, nitrophenyl, phenylpropyl, and               
             methylbutyl, and wherein X is either sulfur or oxygen;                                                   
             J is Arg;                                                                                                
             Cn is a hydroxyl group;                                                                                  
             and pharmaceutically acceptable salts thereof.                                                           





























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