N-Triboc-(S)-2,6-Diamino-N-((S)-6-amino-1-oxo-1-(((S)-1-phenylpropan-2-yl)amino)hexan-2-yl)hexanamide is an intermediate in the synthesis of (S)-2,6-Diamino-N-((S)-6-amino-1-oxo-1-(((S)-1-phenylpropan-2-yl)amino)hexan-2-yl)hexanamide Trihydrochloride Hydrate (D417740), which is an impurity of Lisdexamfetamine, a substituted amphetamine, and inactive prodrug of the CNS which is used to treat ADHD.