Used in solid-phase peptide synthesis to introduce ornithine residues while maintaining orthogonal protection. The Aloc (allyloxycarbonyl) group protects the side-chain amine, allowing selective deprotection under mild conditions without affecting other protecting groups. This makes it valuable in the synthesis of complex peptides and proteins, especially when building sequences with post-translational modifications or cyclic structures. Commonly applied in medicinal chemistry and biochemical research for developing peptide-based drugs and probes.