1 BN1 (S)-2-amino-3-[3-hydroxy-5-(2-methyl-2h-tetrazol-5-yl)isoxazol-4-yl]propionic acid 1.000 2 MP9 2-amino-3-[3-hydroxy-5-(2-benzyl-2h-5-tetrazolyl)-4-isoxazolyl]-propionic acid 0.750 3 5XN (1s)-1-carboxy-2-(5-{2-[(3-chlorophenyl)methyl]-2h-tetrazol-5-yl}-3-oxo-2,3-dihydro-1,2-oxazol-4-yl)ethan-1-aminium 0.720 4 5XO (S)-2-amino-3-(5-(2-(3-methylbenzyl)-2h-tetrazol-5-yl)-3-hydroxyisoxazol-4-yl)propanoic acid 0.720