Used as a key building block in medicinal chemistry, particularly in the design of bioactive molecules and drug candidates. Its rigid bicyclopentane core serves as a bioisostere for phenyl or other aromatic rings, helping to improve metabolic stability, solubility, and reduce off-target effects. The presence of both Boc-protected amine and carboxylic acid functional groups allows for straightforward incorporation into peptide-like structures or further derivatization through standard coupling reactions. Frequently employed in fragment-based drug discovery and in the development of proteolysis-targeting chimeras (PROTACs) due to its favorable physicochemical properties and three-dimensional structure.