1 5EM N-[(2s)-3-amino-1-(hydroxyamino)-3-methyl-1-oxobutan-2-yl]-4-[4-(4-aminophenyl)buta-1,3-diyn-1-yl]benzamide 1.000 2 5EP N~2~-{4-[4-(4-aminophenyl)buta-1,3-diyn-1-yl]benzoyl}-N-hydroxy-L-isoleucinamide 0.933 3 L53 4-[4-(4-aminophenyl)buta-1,3-diyn-1-yl]-N-[(2s,3s)-3-hydroxy-1-nitroso-1-oxobutan-2-yl]benzamide 0.900 4 ZH2 4-[4-(4-aminophenyl)buta-1,3-diyn-1-yl]-N-[(2s,3r)-3-hydroxy-1-(hydroxyamino)-1-oxobutan-2-yl]benzamide 0.900 5 L52 N-[(2s)-3-amino-1-(hydroxyamino)-1-oxopropan-2-yl]-4-(4-phenylbuta-1,3-diyn-1-yl)benzamide 0.897 6 5EN 4-[4-(4-aminophenyl)buta-1,3-diyn-1-yl]-N-[(2s,3s)-4,4-difluoro-3-hydroxy-1-(hydroxyamino)-3-methyl-1-oxobutan-2-yl]benzamide 0.875 7 2CW 4-[4-(4-aminophenyl)buta-1,3-diyn-1-yl]-N-[(2s,3r)-3-hydroxy-2-methyl-1-nitroso-1-oxobutan-2-yl]benzamide 0.871 8 3P3 N-[(1s,2r)-2-hydroxy-1-(hydroxycarbamoyl)propyl]-4-(4-phenylbuta-1,3-diyn-1-yl)benzamide 0.867 9 ZH4 4-[4-(3-aminophenyl)buta-1,3-diyn-1-yl]-N-[(2s,3r)-3-hydroxy-1-nitroso-1-oxobutan-2-yl]benzamide 0.839 10 1WL Nalpha-{4-[4-(4-aminophenyl)buta-1,3-diyn-1-yl]benzoyl}-N-hydroxy-L-histidinamide 0.765 11 A5F N-[(2s)-3-azanyl-3-methyl-1-(oxidanylamino)-1-oxidanylidene-butan-2-yl]-4-[4-[(1r,2r)-2-(hydroxymethyl)cyclopropyl]buta -1,3-diynyl]benzamide 0.750 12 1WN (betas)-nalpha-{4-[4-(4-aminophenyl)buta-1,3-diyn-1-yl]benzoyl}-N,beta-dihydroxy-beta-methyl-L-tyrosinamide 0.730 13 1WM (betas)-nalpha-{4-[4-(4-aminophenyl)buta-1,3-diyn-1-yl]benzoyl}-N,beta-dihydroxy-L-tyrosinamide 0.703