This chemical is a specialized building block primarily used in solid-phase peptide synthesis for constructing complex peptide chains. It incorporates Fmoc-protected lysine (with Boc protection on the side chain) and a threonine-proline dipeptide mimic via the pseudoproline [Ψ(Me,Me)Pro] modification. The Fmoc and Boc groups enable selective deprotection, while the pseudoproline moiety enhances synthesis efficiency by reducing aggregation, improving solubility, and minimizing side reactions during peptide elongation. Its applications are essential in developing therapeutic peptides, research tools, and biochemical studies requiring precise sequences. Additionally, it supports the synthesis of peptide mimics and peptidomimetics, aiding drug discovery by designing stable, bioactive molecules that emulate natural peptides.