This compound, H-D-HoPro-OMe.HCl, is a protected form of D-hydroxyproline primarily utilized in peptide synthesis. It serves as a building block in the creation of complex peptides, with the methyl ester protecting the carboxyl group to ensure the hydroxyproline residue remains intact during the synthesis process. Its application is crucial in pharmaceutical research, where it aids in the development of peptide-based drugs. Additionally, it is used in biochemical studies to explore peptide structure and function, contributing to advancements in understanding protein interactions and enzymatic activities.