Used in organic synthesis and pharmaceutical research as a protecting group for alcohols, particularly in the preparation of complex molecules. Its polyethylene glycol (PEG) spacer enhances solubility in aqueous and organic solvents, making it useful in drug delivery systems. The tetrahydropyran (THP) group provides stability under various reaction conditions, allowing selective deprotection when needed. Commonly applied in the development of prodrugs, peptide synthesis, and bioconjugation strategies to improve bioavailability and target specificity.