Used in pharmaceutical research as a chiral building block for the synthesis of biologically active compounds. Its rigid, fused ring structure with defined stereochemistry makes it valuable in the development of enzyme inhibitors and receptor modulators. Commonly applied in the design of central nervous system agents and anti-inflammatory drugs due to its ability to mimic peptide motifs while offering improved metabolic stability. Also employed in asymmetric synthesis to induce stereoselectivity in complex molecule construction.