D-Ornithine lactam is a building block. It has been used in the synthesis of hepatitis C virus non-structural protein 5B inhibitors, as well as αVβ3 integrin receptor antagonists.
L-Ornithine lactam is a synthetic intermediate. It has been used in the synthesis of dipeptidyl peptidase 4 (DPP-4) inhibitors, as well as signaling peptides.