1 BO2 N-[(1r)-1-(dihydroxyboryl)-3-methylbutyl]-N-(pyrazin-2-ylcarbonyl)-L-phenylalaninamide 1.000 2 FN3 [(1s)-3-methyl-1-[[(2s)-3-phenyl-2-(pyrazin-2-ylcarbonylamino)propanoyl]amino]butyl]boronic acid 1.000 3 UFY N-[(1r)-1-borono-3-methylbutyl]-nalpha-(pyrazine-2-carbonyl)-D-phenylalaninamide 1.000 4 4KZ N-[(1r)-1-(dihydroxyboranyl)-2-phenylethyl]-nalpha-(pyrazin-2-ylcarbonyl)-L-phenylalaninamide 0.735