N-(tert-butoxycarbonylglycyl-(Z)-alpha,beta-dehydrophenylalanylglycyl-(E)-alpha,beta-dehydrophenylalanylphenylalanyl)-4-nitroaniline
n-(tert-butoxycarbonylglycyl-(z)-alpha,beta-dehydrophenylalanylglycyl-(e)-alpha,beta-dehydrophenylalanylphenylalanyl)-4-nitroaniline