(3S,4S)-4-Amino-3-hydroxy-6-methyl-heptanoic acid [5-(2-hydroxy-ethylcarbamoyl)-pentyl]-amide

((S)-1-{(S)-1-Hydroxy-2-[5-(2-hydroxy-ethylcarbamoyl)-pentylcarbamoyl]-ethyl}-3-methyl-butyl)-carbamic acid tert-butyl ester