1 0Z0 N-(trifluoroacetyl)-L-phenylalanyl-N-[4-(trifluoromethyl)phenyl]-L-alaninamide 1.000 2 0QN N-(trifluoroacetyl)-L-valyl-N-[4-(trifluoromethyl)phenyl]-L-alaninamide 0.771 3 0Z2 N-(trifluoroacetyl)-L-leucyl-N-[4-(trifluoromethyl)phenyl]-L-alaninamide 0.750 4 2Z5 6-ammonio-N-(trifluoroacetyl)-L-norleucyl-N-[4-(trifluoromethyl)phenyl]-L-alaninamide 0.730