1 LA9 (2s)-2-{[(R)-{(1r)-1-[(N-acetyl-L-leucyl)amino]ethyl}(hydroxy)phosphoryl]methyl}-4-phenylbutanoic acid 1.000 2 TJE (2s)-2-{[(S)-{(1r)-1-[(N-acetyl-L-tyrosyl)amino]ethyl}(hydroxy)phosphoryl]methyl}-4-phenylbutanoic acid 0.730