Boc-β-Homolys(Z)-OH is a protected derivative of β-homolysine, an unnatural amino acid analog. The α-amino group is protected with a tert-butoxycarbonyl (Boc) group, and the side-chain ε-amino group is protected with a benzyloxycarbonyl (Z or Cbz) group. It serves as a key building block in solid-phase peptide synthesis (SPPS), enabling the incorporation of β-homolysine into peptide sequences. This compound is essential for creating modified peptides and peptidomimetics with enhanced stability or biological properties, particularly in pharmaceutical research, drug development, and studies of protein function.