(beta S)-alpha-hydroxy-beta-(((2S)-4-methyl-1-oxo-2-(((phenylmethoxy)carbonyl)amino)pentyl)amino)-2-oxo-3-pyrrolidinepropanesulfonic acid (1:1) sodium salt
(beta s)-alpha-hydroxy-beta-(((2s)-4-methyl-1-oxo-2-(((phenylmethoxy)carbonyl)amino)pentyl)amino)-2-oxo-3-pyrrolidinepropanesulfonic acid (1:1) sodium salt