1 0ZW N-(tert-butoxycarbonyl)-L-alanyl-N-{(1s)-5-ammonio-1-[hydroxy(3-hydroxypropoxy)boranyl]pentyl}-L-valinamide 1.000 2 0ZY N-(tert-butoxycarbonyl)-L-alanyl-N-{(1r)-5-ammonio-1-[hydroxy(methoxy)boranyl]pentyl}-L-valinamide 0.909 3 0ZX N-(tert-butoxycarbonyl)-L-alanyl-N-[(1s)-5-amino-1-(diethoxyboranyl)pentyl]-L-valinamide 0.833