1 P8D Phosphinate pseudodipeptide L-ala-D-asp 1.000 2 B88 (2s)-2-{[(S)-[(1r)-1-aminoethyl](hydroxy)phosphoryl]methyl}butanedioic acid 1.000 3 2D8 (2r)-3-[(R)-[(1s)-1-aminoethyl](hydroxy)phosphoryl]-2-methylpropanoic acid 0.800 4 LY0 (2r)-3-[(R)-[(1r)-1-aminoethyl](hydroxy)phosphoryl]-2-methylpropanoic acid 0.800 5 P5D (2r)-2-{[(S)-[(1r)-1-amino-2-phenylethyl](hydroxy)phosphoryl]methyl}butanedioic acid 0.714