1 FOB [(1r)-3-[acetyl(hydroxy)amino]-1-(pyridin-4-yl)propyl]phosphonic acid 1.000 2 FOQ [(1s)-3-[acetyl(hydroxy)amino]-1-(pyridin-4-yl)propyl]phosphonic acid 1.000 3 DCV [(1r)-3-[acetyl(hydroxy)amino]-1-(3,4-dichlorophenyl)propyl]phosphonic acid 0.810 4 FM5 3-(N-hydroxyacetamido)-1-(3,4-dichlorophenyl)propylphosphonic acid 0.810 5 34F (1s)-1-(3,4-dichlorophenyl)-3-[formyl(hydroxy)amino]propyl}phosphonic acid 0.762