Used primarily as an intermediate in organic synthesis, especially in the preparation of biologically active compounds. It serves as a protected form of guanidine, allowing selective reactions at other functional sites in complex molecule assembly. Commonly applied in the development of pharmaceuticals, including protease inhibitors and other enzyme-targeted drugs. Its CBz (carbobenzyloxy) protection group is easily removed under mild conditions, making it valuable in peptide synthesis and medicinal chemistry workflows. Also utilized in the creation of arginine analogs and nitric oxide synthase research tools.